Cleaning your interior car windows can be challenging. It can be easy to wind up with streaked windows that look worse than when they were dirty. Streaking can be caused by a variety of things. First, you should understand that, even if you never touch your windows, the interior side of your car windows will become dirty. The fumes and oils that are emitted by your car's interior combine with the air conditioning and ventilation system of your car and literally coat the windows. If you don't remove this film properly, you will wind up with streaked windows.
Use a good window cleaner. Some window cleaner contain ingredients that can actually cause streaking if they are not diluted at the right level. If a window cleaner is too concentrated, it will cause streaks. You also want to use a cleaner specifically designed to cut through the grime that builds up on car windows.
Use a clean, absorbent towel. Change the surface of your towel to avoid spreading dirt, which causes streaks.
Use enough cleaner. If you don't, the window will dry too quickly and you will end up spreading around dirt that causes streaks.
Spray the cleaner on the window, not the towel. According to Mobileworks.com, spraying the cleaner on the cloth--which some claim will avoid streaks--can cause there to be too little window cleaner on the glass and cause streaks.
Dry the windows thoroughly. If you rush the job, you will end up with streaks.
If cleaning a door window, roll it down about an inch so you can clean the top part of the glass first.
Place a rag or newspaper under the glass to protect the surface underneath
Spray window cleaner onto the glass. Use window cleaner specifically designed for auto glass. Do not use window cleaners with ammonia, especially if you have tinted windows. Spray enough cleaner so that it covers the glass without running down the window.
Wipe the window with a damp microfiber cloth. Change the surface of the cloth frequently to avoid spreading dirt.
Dry and buff the surface of the window with a second microfiber cloth. This cloth should not be damp.
If cleaning a door window, roll up the window and clean the bottom portion of the window by repeating Steps 2 through 5.
Clean your windows after you have cleaned to rest of your car's interior. Clean the windshield from the passenger side, where the steering wheel won't get in your way.
Do not use window cleaners with ammonia. They can cause tinted windows to bubble, crack or discolour and harm interior surfaces of your car such as vinyl, rubber and leather.