Window cleaning

At first glance, all glass seems to need is a streak-free finish—but the type of dirt you’re targeting and whether your windows are tinted matter too. Find out how the different cleaners compare and which one to choose.

Spray, foam, or concentrate?

For regular weekly maintenance, a standard spray cleaner like Bad Boys Glass Cleaneror Nuke Guys SEE THROUGHis all you need—spray it on, wipe with a microfiber cloth, and you’re done. If you clean glass more often or work on several cars at once, a concentrate like Koch Chemie GLA Glas Staris a better choice. Dilute it as needed and get many more applications from a single liter.

Ammonia-free for tinted windows

Do you have tint film on your windows? Avoid ordinary household cleaners—many contain ammonia, which can damage the film over time and leave stains. A safer choice is a cleaner developed specifically for cars, such as Gyeon Q²M Glassor Koch Chemie Glass Cleanerwithout alcohol, which are gentler on tint film and the dashboard.

For heavily soiled or greasy glass

Greasy film on the inside (from vapors released by plastic and leather) or dried-on bugs and tar on the outside call for a stronger formula and some time to work. In this case, try concentrated Koch Chemie GLA Glas Star, or, if you clean cars regularly, the larger Gyeon Q²M Glass in a 4L canister, which will last you a long time.

Cleaning and water-repellent protection in one step

Don’t want to handle cleaning and water-repellent protection separately? Gyeon Q²M Glass+or SOFT99 Glaco De Cleanercombine both in one product—you clean the glass and leave behind a layer that makes water run right off while driving. If you’d rather keep cleaning and protection separate and take the latter a step further, check out the full range of rain repellents.