The homemade window cleaner we use in our home uses just 2 ingredients: water + isopropyl alcohol. However, you can customize the mixture with some of the other household ingredients listed below. We’ll share the specific recipes (amounts & things you can combine) in a few more paragraphs, so that’s coming.

Most of these ingredients cost you no more than $2 or $3 each. We spent $4.50 total and can make 2-3x as much cleaner as what comes in a $4 bottle of Windex!

Can I Reuse A Spray Bottle?

It’s tempting to repurpose that old Windex spray bottle for your new cleaner. However, residual chemicals in the bottle can cause nasty, and even toxic reactions if you’re not careful. For instance, bleach and vinegar should never be mixed because they release poisonous chlorine gas. So it’s safest to use new bottles for your homemade cleaners. We use these with built-in labels! If you must use an existing bottle, clean it thoroughly with soap and water.

Why These Ingredients Work

Many store-bought window cleaners overcomplicate their formulas with scents, colors, and harsh chemicals like ammonia (which at least one member of our household is allergic to). Making a DIY window cleaner allows you to add only what’s needed to get the job done!

• Distilled water doesn’t have mineral deposits like ordinary tap water, especially in areas with “hard water.” Because hard water is alkaline, it can undercut the acidic cleaning power of other ingredients.
• Rubbing alcohol is a powerful solvent and disinfectant. The alcohol also evaporates quickly, reducing streaks and water spots.
• White vinegar contains acetic acid which helps break down grime and mineral deposits without damaging surfaces.
• Dish soap breaks down grease and oil. It can also add a pleasant fragrance, or cover up the harsher scents of the other ingredients.
• Essential oils allow you to customize the scent of your homemade cleaner. Just use 5 drops or less because excess oil can cause streaking and build-up on your glass.
• Cornstarch is a mild abrasive that can help remove built-up dirt, like on exterior windows. But be sure to rinse it off thoroughly after use to avoid residue if you add this to your formula.

How To Mix Your Homemade Window Cleaner

There is no “perfect” combination of ingredients, so we encourage you to try a few solutions until you find what you like best. And don’t stress about measuring perfectly. We usually just eyeball it!

• Alcohol Based: 1 cup water + 1 cup rubbing alcohol
• Vinegar Based: 2 cups water + 1/4 cup white vinegar
• Lighter odor, lighter duty: 2 cups water + 1/4 cup isopropyl alcohol + 1/4 cup white vinegar
• Grease Cutting Boost: Add 1/2 tsp or 5-10 drops of mild dish soap to any of the above
• Fragrance Boost: Add 5 drops of any essential oil to any of the above
• Scrub Boost: Add 1 tbsp of cornstarch to any of the above (remember, if you add this, it’ll be abrasive and scrub the window surface more, but it must be thoroughly rinsed off, so it’s an extra step).

Combine your chosen ingredients directly into your spray bottle. It may be helpful to use a funnel. Shake well and label your bottle as “Glass Cleaner.”

Window Cleaning Tips

Here are some additional tips for getting the best result when cleaning glass surfaces like windows or mirrors.

Wait For Shade

Avoid cleaning in direct sunlight or while the glass is still warm from sun exposure. Hot glass will cause your spray to dry out prematurely, leaving streaks and spots. It’s best to clean cool glass so your cleaner can evaporate on its own.

Dust First

Use an extra microfiber cloth or lint-free rag to wipe off surface dust, dirt, and grime before spraying the glass with cleaner. This will help you get a more thorough clean, rather than just moving wet dust around.

Spray, Wait, Wipe

Let your homemade cleaner sit and soak on your window for several seconds before wiping it away. This gives the solvents time to loosen dirt and grime, requiring less elbow grease on your part.

Use The Right Cloth

Avoid using paper towels or old cloths that may leave lint or fuzz. We prefer a microfiber cloth or lint-free rag. Some people swear by using newspaper newsprint, but it should only have black ink, which is hard to come by these days! You can also use a simple squeegee for a perfect finish.

More House Cleaning Advice

If you’re interested in more ways to keep your home clean, check out these posts below:

*This post contains affiliate links, so we may earn a small commission when you make a purchase through links on our site at no additional cost to you.