We started using a homemade window cleaner last year and immediately wondered why we hadn’t switched sooner. It’s far less expensive than store-bought glass cleaners, cleans better, and leaves fewer streaks. The basic formula uses just two ingredients, though you can customize it with optional additions. Grab an empty spray bottle and give it a try.
Homemade cleaners are a smart choice if you’re trying to reduce chemicals in the home and live more sustainably. But even if that’s not your main goal, it’s hard to argue with better results and a much lower cost per bottle.
Ingredients & Supplies
The simple cleaner we use at home requires just two ingredients: water and isopropyl alcohol. Below are optional items you can add to tailor the formula and a short list of supplies you’ll need.
- Empty spray bottle (glass or plastic)
- Water or distilled water
- 70% isopropyl alcohol (rubbing alcohol)
- White vinegar (optional)
- Mild dish soap (optional)
- Essential oils (optional)
- Cornstarch (optional)
- Funnel and measuring cups
Most of these items are inexpensive. With a small investment you can make several bottles of cleaner for less than the cost of a single store-bought product.
Can I Reuse A Spray Bottle?
It’s tempting to reuse an old cleaner bottle, but residual chemicals can react with new ingredients. For safety, use a clean, dedicated bottle for homemade cleaners. If you must reuse one, wash it thoroughly with soap and water before filling it.
Why These Ingredients Work
Many commercial cleaners include unnecessary additives like strong fragrances, dyes, or ammonia. A DIY formula lets you include only what’s effective, so the cleaner works well without extra irritants or costs.
- Distilled water avoids mineral deposits found in hard tap water that can reduce cleaning effectiveness and leave spots.
- Rubbing alcohol is a solvent and disinfectant that evaporates quickly, which helps prevent streaking and water spots.
- White vinegar contains acetic acid that cuts grease and mineral buildup without harming most glass surfaces.
- Dish soap helps dissolve grease and grime; use a few drops to boost degreasing power.
- Essential oils add a pleasant scent—use sparingly (about five drops) to avoid oily residue.
- Cornstarch can provide mild abrasion for extra dirt removal but must be rinsed away to avoid leaving residue.
How To Mix Your Homemade Window Cleaner
There’s no single perfect recipe. Try the options below and adjust concentrations to fit your needs. Exact measuring isn’t critical—many people simply eyeball the ratios.
- 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 mix
- Fragrance boost: Add up to 5 drops of essential oil
- Scrub boost: Add 1 tbsp cornstarch for mild abrasion (must be rinsed thoroughly)
Mix ingredients directly in the spray bottle—using a funnel can help. Shake well and label the bottle “Glass Cleaner.” Store in a cool, shaded place.
Window Cleaning Tips
Follow these simple tips for streak-free windows and mirrors.
Wait For Shade
Clean glass when it’s cool and out of direct sunlight. Hot glass causes cleaners to evaporate too quickly and can leave streaks.
Dust First
Remove loose dust and dirt with a microfiber cloth or lint-free rag before applying cleaner. This prevents you from smearing dust into the wet solution.
Spray, Wait, Wipe
Allow the cleaner to sit for several seconds so solvents can loosen grime, then wipe with minimal pressure for best results.
Wipe In A “Box + S” Pattern
Start by wiping a box around the window edges and corners, then wipe in a continuous top-to-bottom “S” motion. This technique ensures thorough coverage and helps avoid streaks.
Use The Right Cloth
Avoid paper towels and old fuzzy rags. Use a clean microfiber cloth or lint-free rag for the best finish. A small squeegee can also give an excellent, streak-free result.
More House Cleaning Advice
If you want more practical cleaning tips for the home, explore guides on cleaning sinks, choosing household cleaners, pest control, pressure washing basics, and air purifiers to keep your space fresh and well maintained.