The best product for getting reliably clean and clear glass is
First, mix water and vinegar into a bottle, preferably with a spray nozzle. The mixture should be ⅓ water to ⅔ vinegar. Spray the solution over a window with hard water stains and let soak for 1-2 minutes. Second, wipe off with a dry cloth.
Professional window cleaners like Window Genie are trained and experienced in this battle. Window Genie uses a polishing paste specifically designed to fight the minerals that create these stains. The paste is applied to a non-abrasive cleaning pad and the window is lightly scrubbed.
Invisible Glass Spray Cleaner earns our top spot because it is easy to use, highly effective on glass, and powerful enough to tackle tough grime.
Professional window cleaners use a solution made from dish soap and water to achieve a streak-free clean. The key is to use a small amount of soap and distilled water. Some professionals add ammonia to the water for increased cleaning power.
Best Overall: Stoner Invisible Glass Glass Cleaner
Invisible Glass Glass Cleaner quickly and easily removes fingerprints, smudges, grease and grime without leaving behind residue for a streak-free shine without soaps, scents or dyes. In fact, Invisible Glass guarantees a streak-free finish or your money back.
Clean windows with a white vinegar or soap solution, as you would on the inside. Dry the window with a squeegee, moving from the top of the window with the squeegee blade angled toward the bottom. Reinstall the window screens.
Distilled White Vinegar and Lemon Juice
Let the cleaning solution work on the stain for about five minutes. Use a microfiber cloth to rub the stained area until the stain is gone. Rinse the area with a clean camp cloth. Dry the glass.
You can clean water marks off of clear glass with CLR® Calcium, Lime & Rust Remover.
Soak Glass in White Vinegar
Wearing gloves, Roberson says to dip paper towels into the hot vinegar and stick them to your shower glass. "The slightly acidic nature of vinegar allows it to soak into and loosen the mineral deposits," he says. Let the vinegar sit for 30 to 60 minutes, then remove the paper towels.
Windows are one of the areas of the house that vinegar cleans super well, as it can knock out hard-to-remove stains and makes the glass super shiny. Of course, cleaning windows with vinegar isn't just a case of cracking open a bottle, splashing your windows, and hoping for the best.
It's important to note that while Magic Erasers are generally safe for use on most glassware, it's always a good idea to test a small, inconspicuous area first to ensure that the surface isn't damaged or scratched by the abrasive foam material.
Using WD-40®: WD-40® Multi-Use Product is great when it comes to mirror cleaning and water spot removal. It is easy to use and all you have to do is spray the liquid on to the affected area and wipe it clean with a clean cloth. It will leave your glass windows and mirrors sparkling clean and as good as new.
In many areas, hard water is the cause of bad streaks and stains on glass. Salt and other minerals in the hard water might look clean as you wash the window, but once dry it becomes a white streaky mess.
Mix up your window-cleaning solution: In a plastic spray bottle, mix together 2 cups of warm water with 1/4 cup white vinegar and 1/2 teaspoon of Dawn. Sweep away dirt: Using a broom, sweep away the cobwebs and debris from the windows and sills.
Are there hard water stains on your windows? If so, you might have noticed this common problem: No matter how rigorously you clean them, the windows still appear cloudy, with chalky white residue. If you notice these tell-tale signs, chances are, there are hard water stains on home's windows.
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.)
Most glass cleaners have ammonia, which has a strong scent but leaves windows clear with a streak-free finish, most of the time. If you have pets or children, you may opt for a more natural cleaner without ammonia, many of which use white vinegar instead.
Heavy-Duty Glass & Surface Cleaner contains oil-cutting detergents, solvents, and degreasers. The heavy bodied foam clings to the surface and easily cleans away dirt, grime, greases, films, smears, and bugs. Heavy-Duty Glass & Surface Cleaner contains no oils, waxes, or silicones.
The blue solution in the reservoir is an alcohol-based glass cleaner probably diluted with some water. After multiple people have wiped bugs, mud, oil, and gasoline off their vehicle using the squeegee and dunked it back into the tub, that fluid is more filth than detergent.
Window washing solution: This is very important because it removes dirt and helps reduce the number of streaks. A typical solution used by professionals is 3/4 cup clear ammonia or white vinegar, 1 gallon of water and 2 to 4 teaspoons blue Dawn dishwashing liquid combined in a bucket.