Homemade Window Cleaner

Homemade window cleaner is a simple mix you make yourself from everyday household items. It is used to clean glass and often does so as well as, or better than, many store-bought products. It gives you shiny, streak-free windows without relying on strong chemicals that may bother your skin, lungs, or the environment. This kind of cleaner has become very popular as more people want cleaning options that are cheaper, eco-friendly, and easy to adjust to their own needs. Instead of feeling like a step down from commercial brands, many people find these DIY mixtures leave glass very clear and make their homes look brighter.

The real appeal of homemade window cleaner is how easy it is to make and use. Most of what you need is usually already in your pantry or under your sink, so you can mix up a batch whenever smudges appear. This article looks at the key parts of making your own window cleaner-from the main ingredients to the best ways to use them for streak-free results. We’ll go through the benefits, answer common questions, and give a clear guide so you can get spotless windows with your own homemade spray.

What Is Homemade Window Cleaner?

Homemade window cleaner is a glass-cleaning liquid you mix at home with basic, easy-to-find ingredients. Unlike many commercial cleaners that use long lists of synthetic chemicals, homemade versions rely on the natural cleaning power of things like vinegar, alcohol, and a little dish soap. The goal is the same: clean, streak-free windows, mirrors, and other glass. But with DIY cleaner, you control what goes into the bottle and how gentle or strong it is.

This DIY method is more than just pouring random liquids into a spray bottle. It helps to know why certain ingredients work and how they remove dirt, grease, and fingerprints. Some ingredients cut through oils, others dry quickly to avoid streaks, and some add mild disinfecting power. Each piece has a specific job and helps the cleaner work well. Many people also like that this approach supports better health, reduces waste, and lets them adjust the formula to fit their own home and preferences.

How Does Homemade Window Cleaner Differ from Store-Bought?

The main difference between homemade and commercial window cleaners is what they contain and the idea behind them. Store-bought cleaners often use a mix of synthetic chemicals, dyes, and fragrances. These can work very well but may have strong smells and sometimes raise concerns about air quality, skin irritation, or environmental impact. Some glass cleaners, especially those with ammonia, can leave a thin film on the glass over time, which can make windows look dull or streaky.

Homemade window cleaners usually use simple, food-safe ingredients like vinegar, water, rubbing alcohol, and a tiny bit of dish soap. You know exactly what is in the bottle. Without petroleum-based ingredients, artificial colors, or heavy perfumes, these sprays are often gentler on people and pets. Rubbing alcohol dries very fast, which helps prevent streaks, and many homemade mixes leave behind less residue than some commercial products, so glass stays cleaner for longer.

Is Homemade Window Cleaner Safe for All Types of Windows?

For most regular glass windows and mirrors, homemade window cleaners are safe and effective. Common ingredients such as white vinegar, distilled water, and rubbing alcohol are gentle on glass and standard window frames. Vinegar’s mild acid helps remove grease, dirt, and mineral spots. Alcohol dries quickly and does not harm normal window materials.

Still, you should keep a few things in mind. Vinegar should not touch certain natural stone surfaces like marble or granite sills, because its acidity can mark and dull the stone. For glass with special coatings-such as some energy-efficient, low-e, or tinted windows-it’s smart to test your cleaner on a small, hidden corner first. Avoid using ammonia on tinted windows, as it can damage the film. The vinegar- and alcohol-based recipes in this article are generally considered safe for most indoor and outdoor windows.

Benefits of Using Homemade Window Cleaner

Switching to homemade window cleaner helps in more ways than just cleaning glass. It can support your health, help the environment, and save money. As more people pay closer attention to what they bring into their homes, making your own cleaner is a simple way to reduce extra chemicals and packaging.

Using DIY cleaner can lower your exposure to harsh substances, cut down on waste, and trim your budget. Let’s look more closely at why making your own window cleaner is a smart choice for you and your home.

Reduces Chemical Exposure

One big benefit of homemade window cleaner is using far fewer synthetic chemicals. Many commercial window sprays contain a mix of artificial fragrances, dyes, and solvents. While these are approved for home use, frequent exposure can be a problem for people with allergies, asthma, or sensitive skin. Strong fumes can bother the eyes, nose, and throat and affect indoor air quality.

Homemade cleaners usually rely on ingredients like white vinegar, rubbing alcohol, and a bit of dish soap-items you recognize and may already use in cooking or basic cleaning. Skipping extra synthetic additives can support a healthier home by lowering the risk of skin reactions, breathing issues, or headaches some people get from harsh cleaners. It’s a simple change that makes your cleaning routine safer for everyone in the house, including kids and pets.

Environmentally Friendly Ingredients

Homemade window cleaners are also easier on the environment. Many commercial cleaners are made in large factories that use a lot of energy and may create pollution. Their chemical ingredients can also enter waterways after rinsing down drains, which can affect lakes, rivers, and sea life. Add to that the plastic bottles that often end up in the trash, and the total impact can be quite large.

DIY window cleaners use ingredients that are generally biodegradable and simpler in makeup. White vinegar comes from natural sources, and water is a basic ingredient you already have. By reusing the same spray bottle and buying ingredients in larger containers, you reduce plastic waste and the need for more manufacturing and shipping. Over time, this small change can help lower your household’s overall environmental footprint.

Cost-Effectiveness Compared to Commercial Products

Homemade window cleaner is also very budget-friendly. Many brand-name glass cleaners are pricey, especially the ones that promise special streak-free formulas. If you clean windows often or have a lot of glass in your home, these costs can add up quickly.

By comparison, the main ingredients for DIY cleaner-white vinegar, rubbing alcohol, distilled water, and a tiny amount of dish soap-are cheap and usually bought in large bottles. A gallon of vinegar can make many batches of cleaner for just a small cost. Some people report that their first batch, including the spray bottle, cost around $1.50, with later refills costing about $0.50 each. These savings can quickly become noticeable in your monthly budget.

Customizable Scents and Strengths

Another plus of making your own window cleaner is that you can adjust it exactly how you like. Store-bought products come with fixed scents and formulas. With DIY cleaner, you choose how strong it is and how it smells.

If you dislike the smell of vinegar, you can add a few drops of an essential oil to change the scent. Lemon, lavender, peppermint, or tea tree oil are common choices. Some of these oils also add mild antibacterial or antifungal effects. You can also adjust how strong the cleaner is. For very dirty windows, you might use more vinegar or alcohol. For light, everyday cleaning, you can dilute the mix more. This way, your cleaner can match your personal tastes and the cleaning jobs in your home.

Key Ingredients for Homemade Window Cleaner

Most effective homemade window cleaners use just a few basic ingredients that you may already have. Each one has a specific job, and together they remove dirt, cut grease, and help you get streak-free glass. Knowing what each ingredient does helps you choose the right recipe for your needs.

From the mild acid in vinegar to the quick-drying nature of rubbing alcohol, these common items form the base of many DIY glass cleaners. Here’s a closer look at each one.

White Vinegar

White vinegar is often the main ingredient in homemade cleaners. Its cleaning power comes from acetic acid, which gives vinegar its sharp smell and taste. This acid is very good at loosening and dissolving dirt, grease, and mineral spots, such as hard water marks on glass.

Vinegar also has mild antibacterial properties, which can help reduce some germs on hard surfaces. It works well to remove old film left by other cleaners or by pollution and dust. While the odor may seem strong at first, it fades quickly as the surface dries. Regular white vinegar from the grocery store works fine; there is no need to buy special “cleaning vinegar” unless you want a stronger formula for very stubborn buildup.

Rubbing Alcohol

Rubbing alcohol (isopropyl alcohol) is another key ingredient in many window cleaner recipes. It acts as a strong solvent and dries very quickly. It helps lift off greasy marks, fingerprints, and stuck-on dirt that vinegar alone might not remove as easily.

Its fast evaporation is especially helpful for streak-free cleaning. Because it dries faster than water, it leaves less time for spots or streaks to form. A 70% isopropyl alcohol solution is commonly used and works well. It helps glass dry quickly and evenly, which means less buffing and wiping for you.

Distilled Water

While tap water seems like an obvious choice, distilled water can give much better results in glass cleaners. Tap water often contains minerals and other dissolved solids. When it dries on glass, these minerals can leave behind spots or streaks, especially in areas with hard water.

Distilled water has most of these minerals removed. This means that when it evaporates, it doesn’t leave a visible residue behind. Vinegar and alcohol do the cleaning, and there is nothing in the water to spoil the finish. For indoor windows and mirrors, or whenever you want the cleanest possible result, using distilled water is a small step that can greatly improve the look of your glass.

Dish Soap

Adding a little bit of dish soap to a window cleaner might sound odd, since soap can cause streaks. But in very small amounts, a grease-cutting liquid dish soap can greatly improve cleaning power. It contains surfactants, such as sodium lauryl sulfate, that cling to oils and dirt and help lift them off the surface.

For windows with heavy pollution, oily film, or stubborn grime, a couple of drops of dish soap can help break down the mess so it wipes off more easily. Dish soap reduces surface tension in the water, allowing the solution to spread and reach dirt more effectively. The key is using very little-usually just one or two drops in a full spray bottle. Too much soap will leave streaks and a cloudy film.

Cornstarch

Cornstarch is an optional ingredient that can boost cleaning power for very dirty or cloudy windows. It acts like a fine, gentle scrub, helping to loosen and absorb oils and stubborn deposits on the glass. You can think of it as a very mild polishing powder that works alongside vinegar and alcohol.

It can be especially helpful for hard water spots and hazy films that are hard to remove with liquid cleaners alone. The tiny particles help rub away buildup without scratching the glass. If you use cornstarch in your spray, you need to shake the bottle very well before each use so the powder does not settle at the bottom. It’s not required for everyday cleaning, but it can be very helpful for problem windows.

Lemon Juice

Lemon juice can replace or support white vinegar in some window cleaner recipes. Its cleaning power comes from citric acid, which, like acetic acid, breaks down grease, grime, and mineral spots on glass. It can help dissolve tough buildup so it wipes away more easily.

Many people like lemon juice because it smells fresher and lighter than vinegar. If you don’t enjoy the sharp vinegar odor, using lemon can make your cleaner more pleasant to use. Both acids work well for normal household cleaning. Fresh-squeezed lemon juice is best, but bottled lemon juice can also work. Just check the label, since some bottled versions contain extra ingredients you may not want in a cleaner.

Essential Oils (Optional)

Essential oils are optional but popular additions to homemade window cleaners. They are mainly used to change the smell of the spray and cover the sharp vinegar scent. While vinegar and alcohol do most of the cleaning work, essential oils can make the whole process smell nicer.

Some oils, like tea tree oil, also add mild antibacterial or antifungal benefits. Citrus oils such as lemon or orange can help with greasy residue, while lavender or peppermint can provide a calming or refreshing scent. Usually 10-15 drops in a standard spray bottle is plenty. Keep in mind that essential oils are still oils, so using too much could possibly cause streaks. In small amounts, though, they blend into the mixture without a problem.

Precautions and Safety When Making Homemade Window Cleaner

Homemade window cleaners are often safer than harsh commercial products, but they still need to be handled with care. Household ingredients can be harmful if mixed the wrong way or not stored properly. Safe mixing, avoiding dangerous combinations, and smart storage all matter for a safe, effective cleaner.

With a bit of basic knowledge, you can turn common items into powerful cleaners while keeping your home safe. Here are some important safety tips.

Proper Ingredient Handling and Mixing

When you start making your own cleaners, it’s helpful to follow a few simple steps. Use a clean, empty spray bottle made from sturdy plastic, and if possible, use one with an adjustable nozzle. A small funnel makes it easier to pour liquids without spilling, especially vinegar or rubbing alcohol.

It usually works well to pour in the water first, then the vinegar and alcohol, and finally any dish soap or essential oils. This order helps the ingredients mix smoothly. After adding everything, screw on the spray top tightly and shake the bottle 5-6 times. If your recipe includes cornstarch, shake the bottle before every use so the powder doesn’t settle. Always measure carefully; too much dish soap or another ingredient can cause streaks or reduce cleaning power.

What Not to Mix with Vinegar or Ammonia

The most important safety rule for homemade cleaners is this: never mix vinegar with chlorine bleach. When the sodium hypochlorite in bleach reacts with the acetic acid in vinegar, it produces chlorine gas, which is highly toxic. Breathing chlorine gas can damage your lungs and eyes and can even be life-threatening in high amounts.

Also, do not mix ammonia with bleach. This combination forms dangerous gases called chloramines. To stay safe, keep bleach and ammonia separate from each other and from all vinegar-based cleaners. Stick to safe mixes like vinegar and rubbing alcohol, and always read the labels on any commercial products you use so you don’t accidentally combine them with your DIY sprays.

Storage and Child Safety Advice

After you mix your window cleaner, proper storage keeps it both safe and effective. Always label your spray bottle clearly with the contents (for example, “Homemade Window Cleaner – Vinegar & Alcohol”) and the date you made it. This helps prevent confusion and makes it clear that the bottle contains a cleaning product, not water or something to drink.

Store all cleaners-homemade or store-bought-out of the reach of children and pets. High shelves, locked cupboards, or childproof cabinets are good choices. Keep the bottle in a cool, shaded place away from heat sources and open flames, since rubbing alcohol is flammable. Though homemade cleaners use fairly common ingredients, they are still not safe to drink and can irritate eyes and skin. Good labeling and storage help prevent accidents and keep your cleaner in good condition.

Step-by-Step Guide to Making Homemade Window Cleaner

Making your own window cleaner is quick and simple. You only need a few ingredients and basic tools, and you’ll have a spray ready to tackle smudges and dirt. The steps below walk you through the whole process, from gathering supplies to storing your finished cleaner.

Collect your materials, follow the mixing steps, and you’ll have a reliable, streak-free window cleaner in minutes.

Gathering Materials and Tools

Before you start, gather everything you need so the process goes smoothly. You’ll need:

• 1 clean, empty spray bottle (sturdy plastic with adjustable nozzle)
• White vinegar
• Rubbing alcohol (70% isopropyl is common)
• Distilled water
• Optional: liquid dish soap
• Optional: cornstarch
• Optional: essential oils for scent
• Measuring cup and measuring spoons
• Small funnel

Having all of this laid out before you begin makes it easier and faster to mix your cleaner and start using it.

Mixing the Ingredients Safely

Once your materials are ready, you can start mixing. Place the funnel in the neck of your spray bottle. A common recipe goes like this:

• 2 cups distilled water
• ¼-½ cup white vinegar
• ¼-½ cup rubbing alcohol
• 1-2 drops liquid dish soap (optional)
• A pinch (about ⅛ teaspoon) cornstarch (optional)

Pour the distilled water into the bottle first. Then add the vinegar and rubbing alcohol. If you’re using dish soap, add only a drop or two; more can cause streaks. If you want extra scrubbing power, add a small pinch of cornstarch. Remove the funnel, screw on the spray top, and shake the bottle several times so everything mixes evenly. If you’ve included cornstarch, remember to shake the bottle before every use to re-blend the mixture.

Adding Essential Oils for Fragrance (Optional)

If you’d like your cleaner to smell nicer or to cover the vinegar scent, you can add essential oils. After mixing the main ingredients, take off the spray top and add 10-15 drops of your chosen oil directly into the bottle. Good options include:

• Lemon – bright, clean citrus scent
• Lavender – calm, floral aroma
• Peppermint – cool, refreshing smell
• Tea tree – sharp, clean scent with extra antimicrobial benefits

Replace the spray top and shake the bottle again. This spreads the oils throughout the mixture and gives your cleaner a light, pleasant smell without affecting its cleaning power.

Labeling and Storing Your Cleaner

After you’ve mixed your cleaner, label the bottle clearly with the name of the cleaner and the date. For example: “Natural Window Cleaner – 06/2025.” This helps everyone in the home know what is inside and avoids confusion with other liquids.

Store the bottle in a cool, shaded place like a cabinet or closet, away from sunlight and heat. Keep it out of reach of children and pets. Try to use water-based mixtures within about 3 months, as water can eventually allow bacteria to grow. Mixes with mostly vinegar and rubbing alcohol and little or no water can last longer. If you notice any strange smell, color change, or particles that don’t shake away, it’s a good time to mix a fresh batch.

Popular Homemade Window Cleaner Recipes

One of the strengths of homemade window cleaner is that you can choose from several simple recipes, depending on what you have on hand and how dirty your windows are. Most use the same few ingredients but in different amounts and combinations.

Below are some well-loved recipes that many people use for clear, streak-free glass.

Vinegar and Water Solution

The simplest homemade window cleaner is just white vinegar and water. It is very inexpensive and works well for routine cleaning. The vinegar cuts through dirt, grease, and light mineral spots, leaving glass clear.

To make this cleaner, mix equal parts white vinegar and distilled water, for example:

• 1 cup white vinegar
• 1 cup distilled water

Pour into a spray bottle, shake gently, and it’s ready to use. While you can use tap water, distilled water helps avoid streaks from minerals. This basic mix also doubles as a general-purpose household cleaner for many hard surfaces.

Vinegar, Water, and Rubbing Alcohol Blend

If you want faster drying and even fewer streaks, add rubbing alcohol to the vinegar and water mix. This stronger blend cuts heavier grime and dries quickly, which helps prevent water marks.

Two common versions are:

Ingredient	Recipe A	Recipe B
Distilled water	1 cup	2 cups
Rubbing alcohol	1 cup	¼ cup
White vinegar	1 tablespoon	½ cup

Combine the ingredients in a spray bottle and shake gently. The vinegar breaks down residue while the alcohol dissolves oils and speeds drying, leaving glass very clear with minimal effort.

Vinegar, Water, Alcohol, and Cornstarch Formula

For very dirty windows or glass with stubborn hard water stains, adding cornstarch to the basic mix gives extra cleaning power. Cornstarch offers mild scrubbing action that helps remove mineral spots and built-up film.

A popular recipe is:

• ¼ cup rubbing alcohol
• ¼ cup distilled white vinegar
• 1 tablespoon cornstarch
• 2 cups distilled water

Pour all ingredients into a spray bottle and shake well. The cornstarch will sink over time, so shake thoroughly before each use. This recipe is especially useful for outdoor windows that haven’t been cleaned in a while or glass with layers of residue.

Vinegar, Water, and Dish Soap Combination

For windows coated with oily residue, pollution, or heavy grime, a small amount of dish soap can make a big difference. Glass installers often recommend this kind of mix for stubborn films and chalky buildup.

One often-used formula is:

• 2 cups lukewarm water
• ¼ cup distilled white vinegar
• ½ teaspoon (or 1-2 drops) grease-cutting liquid dish soap

Measure carefully; too much dish soap leads to streaks. This mix is great for exterior windows that you can rinse with a hose afterward. For indoor glass, you may want a second bottle filled with clean water to rinse away any soap before drying with a cloth.

How to Use Homemade Window Cleaner for Best Results

Mixing a good cleaner is only part of the job. How you use it-what cloths you choose, when you clean, and how you wipe-has a big effect on how your windows look afterward. The right tools and technique can turn an average result into a truly clear, shiny finish.

Here are some simple methods that help your homemade cleaner work its best.

Choosing the Right Cloth or Wipe

The type of cloth you use matters a lot for streak-free windows. Paper towels often leave lint and can cause static that attracts dust. For better results, choose better tools.

Microfiber cloths are usually the best option. Their fine fibers grab dirt, moisture, and cleaner without leaving behind lint. It’s helpful to use two:

• One cloth to spray and wipe off the dirt
• A second, dry cloth to buff and polish the glass

A chamois also works well. Some people like using newspaper, which can be lint-free and absorbent, but the ink can transfer, so it’s better for outside windows. For very dirty exterior windows, you might use a soft-bristle brush on a pole to scrub and then rinse with a hose. Whatever you use, make sure it is clean and free of lint before you start.

Best Time and Weather Conditions for Window Cleaning

The weather and time of day can change how well your windows turn out. It may seem natural to clean on a sunny day, but direct sunlight on glass warms it up, causing cleaner to dry too fast. This quick drying often leaves streaks and water marks.

For the best results, clean windows on a cloudy or overcast day. The cooler temperature and softer light give you more time to wipe before the cleaner dries. If clouds aren’t an option, clean windows when they’re in the shade or work early in the morning or later in the afternoon. This helps the cleaner dry more slowly and evenly, which makes it easier to get a clear finish.

Techniques for Streak-Free Windows

Good technique is key for truly streak-free windows. Start by cleaning the window tracks and frames. These areas collect a lot of dirt that can smear onto the glass if you skip them. Once the frames are clean, spray your homemade cleaner onto the glass, covering the whole surface.

Use a microfiber cloth or soft brush to gently scrub away grime. For outdoor windows cleaned with a dish soap mix, rinse thoroughly with clean water before the solution dries. For indoor windows, or if you can’t rinse, quickly wipe the glass with a clean, dry microfiber cloth from top to bottom. If you use a squeegee, overlap each stroke slightly and wipe the rubber blade with a cloth after each pass to prevent drips and lines. Work in one direction-either up and down or side to side. Finish by buffing the edges and any damp spots with a separate dry, lint-free cloth for a crystal-clear shine.

Frequently Asked Questions about Homemade Window Cleaner

People often have similar questions when they start using homemade cleaners. Knowing where these cleaners work well and where they don’t can help you get better results and avoid damage.

Here are answers to common questions about using DIY window cleaner on different glass surfaces, on hard water stains, and about how long it keeps.

Can Homemade Cleaners Be Used on Mirrors and Glass?

Yes. Homemade window cleaners work very well on mirrors and most other glass surfaces. You can use them on bathroom mirrors, glass tables, shower doors, and car windows. Many people like DIY cleaners specifically because they leave mirrors clear and shiny without the cloudy film that some commercial glass sprays leave behind.

For mirrors and decorative glass, vinegar and rubbing alcohol formulas are often the best choice. Use a clean microfiber cloth to spray, wipe, and buff. For car windows, avoid any recipe with ammonia, especially if the windows are tinted, as ammonia can damage tint film. Vinegar and alcohol-based cleaners without ammonia are generally safe. Some people even use a vinegar, distilled water, and dish soap formula on mirrors, glass, car windows, and stainless steel with good results.

Does Homemade Cleaner Work on Hard Water Stains?

Yes, homemade window cleaners can help with hard water stains, thanks mainly to white vinegar. Hard water stains form when mineral-rich water dries and leaves calcium and magnesium behind. Vinegar’s acetic acid breaks down these mineral deposits and can loosen them so they wipe away more easily.

For light or fresh hard water marks, a strong vinegar-and-water solution or a mix with rubbing alcohol usually does the job with some scrubbing. For tougher stains that have built up over time, adding cornstarch to your recipe gives extra scrubbing help. The fine particles gently rub away the deposits while the vinegar softens them. Let the cleaner sit on the stain for a few minutes, then scrub and wipe. In very stubborn cases, you may need to repeat the process.

How Long Does Homemade Window Cleaner Last?

How long your homemade cleaner lasts depends on what’s in it, especially how much water it contains. Cleaners with water (even distilled water) are best used within about 3 months. While vinegar and alcohol help preserve the mix, water can slowly allow bacteria or mold to grow if stored for a long time, especially in warm places.

Mixtures made mostly of vinegar and rubbing alcohol with little or no water can last longer, often up to 6 months or more, since both ingredients are stable. To make any cleaner last longer, keep it in a cool, dark place and close the bottle tightly. If you notice any strange smell, cloudiness, or particles that don’t go away with shaking, throw it out and make a fresh batch.

Final Tips for Homemade Window Cleaner Success

Getting started with homemade cleaners can feel very satisfying. Still, you might run into issues like streaks or cloudy spots at first. A few simple tips can help you fix common problems and know when to choose a different mix.

Troubleshooting Common Problems

The most common complaint with any glass cleaner is streaks. If your windows are streaky:

• Check how much dish soap you used. Too much will leave a film. Reduce it to just a drop or two.
• Try switching from tap water to distilled water to avoid mineral spots.
• Avoid cleaning in direct sun or on hot glass so the cleaner doesn’t dry too fast.
• Stop using paper towels; use clean microfiber cloths or a squeegee instead.

If your glass looks hazy, there may be leftover residue from old commercial cleaners. A recipe with cornstarch can help scrub through that film. For outdoor windows cleaned with dish soap, rinse very well. Leftover soap is a common source of cloudiness. By checking each of these factors one by one, you can usually find and fix the problem.

When to Avoid Using Vinegar-Based Solutions

Vinegar is useful for many jobs, but there are times when you should skip it:

• Natural stone: Do not use vinegar on marble, granite, travertine, or similar stone window sills or counters. The acid can etch and dull the stone.
• Special coatings and films: Be careful with anti-glare coatings, some screen surfaces, and certain tinted or coated windows. Test a small hidden area first or check the maker’s cleaning instructions.
• Very cold glass: Avoid using hot water with vinegar on very cold windows, as sudden temperature changes can stress or crack the glass. Use cool or lukewarm water instead.
• Bleach mix: Never mix vinegar with chlorine bleach, as this creates toxic chlorine gas.

By keeping these few limits in mind, you can safely enjoy the benefits of your homemade vinegar-based window cleaner on most glass surfaces in your home.