Have you ever spent hours washing your windows, only to notice streaks everywhere? This has to do with the evaporation rate—if your cleaning solution evaporates before you have time to wipe it off, it will leave a mark.
The Right Technique. It's often recommended to spray the window cleaner directly on your microfiber cloth, newspaper, or t-shirt instead of the glass. The reason is that this will help you avoid drips that can leave streaks if you don't wipe them up quickly.
But even mirror-specific products like Windex, while effective at cleaning, can leave your mirror full of streaks because they contain so much soap. While streaks are annoying, they aren't the only issue that can come up when you're cleaning mirrors.
For best results, avoid using Windex® Original Glass Cleaner on very hot or cold surfaces. The product may evaporate before wiping and cause streaking. Choosing the right towel can also help achieve a streak-free shine. Extra-absorbent paper towels can leave lint and film behind because they are treated.
A microfiber cloth is ideal but a gentle and clean paper towel can work as well. Rub from multiple directions to help avoid streaking. If you find that you still have streaks after you've cleaned your window, simply rinse with clear water to help remove any of the remaining cleaning solution.
If you have smeared windows when you're finished cleaning, you've left cleaning solution, soap, or minerals behind. Whether you have white residue on windows or another blemish, the solution is the same. Clean faster, use cleaner water, and wipe away all your solution, so nothing is left behind.
Another glass-cleaning recipe calls for 1 cup (236 milliliters) of water mixed with 1 cup of rubbing alcohol and 1 tablespoon of vinegar (rubbing alcohol also prevents glass streaks) [source: Aguirre]. Similar to standard cleaners, vinegar water comes with its own aroma.
Windex and even generic versions of it contain a powerful chemical, ammonia, which gives the product its telltale pungent scent. Ammonia is colorless at room temperature, has alkaline properties, and is highly corrosive and irritating, according to the New York State Department of Health.
For best results, make sure you completely rinse suds. Do not allow product to dry before rinsing, rinse windows from top to bottom and use Windex® Outdoor Sprayer when the temperature is above 55º F. If the product is applied to eaves or siding above windows, it may drip down on windows.
Why do my mirrors streak when I clean them? Experts suggest that streaks are primarily caused by the wrong tools. If you're using products with soaps and additives (that are less able to evaporate) or you're wiping with a crude edge (such as those on paper towels) then you're less likely to achieve a spotless finish.
In a spray bottle, combine either ¼ cup vinegar with 2 cups water OR ½ teaspoon of Dawn Dish Soap with 2 cups water. Shake the mixture thoroughly. (If you've got hard water, consider using distilled water to clean your mirror so that it won't leave residue.)
You'll have plenty of time to catch the drips. For cleaning smaller surfaces, Windex® Original Wipes achieve a streak-free shine in a spray-free format.
Wipe off any excess cleaner to prevent streaks
You can use a squeegee for a streak free finish. Also work in an S-shape. Periodically wipe the squeegee blade on a clean rag to avoid smearing dirt around. Remove remaining water with a damp chamois or microfibre cloth and dry the windowsill.
Spray a stronger mix of 1:1 water and vinegar (or Windex, or glass cleaner) at your window, so that the solution covers most of the glass. (I found Windex to work better, but if you have pets—or kids—who frequently lick outdoor windows, vinegar may be the best route for you.)
You'll like the vinegar scent much better. It's not overwhelming, but strong enough to know it's better than the old regular blue spray bottle. Great for glass tables, windows and bathrooms. This is my favorite windex.
Glass Cleaner Alternatives That Really Shine. First, as most of us know, Windex does an excellent job of cleaning windows and mirrors. That's because the main ingredient in the product is ammonia. Ammonia is a strong chemical with just enough abrasive properties to remove dirt and grime without scratching the glass.
Potential Health Effects
Skin : Prolonged or repeated contact may dry skin and cause irritation. Inhalation : No adverse effects expected when used as directed. Ingestion : May cause irritation to mouth, throat and stomach. May cause abdominal discomfort.
You should wear a mask when cleaning the bathroom to protect yourself against harsh cleaning chemicals. The face mask will filter out toxic chemicals before they can reach your airways, protecting your internal systems. They can also protect your skin if any of the cleaning products splash on your face.
“You're basically damaging the skin barrier,” she said. “Not only can it cause inflammation and irritation, but if it's your go-to remedy, it can also lead to eczema and other major skin issues down the road. I would absolutely avoid it.”
Smears and streaks on windows are mainly caused by watermarks and areas where cleaning solution has remained on the surface – this is down to excess moisture not being absorbed when wiped away. Window cleaning products will say that they are streak-free, but it is not that simple.
Window cleaning professionals suggest avoiding window washing on very sunny days or at a time when a window is in direct sunlight, as the heat may cause the glass to dry too quickly and cause smears.