Anything that reduces your ability to see clearly while driving is a safety hazard--this includes haze on the inside of your car’s windshield. If you or your passengers smoke, much of this haze is caused from a build-up of smoke residue. Even if you do not smoke in your car, however, interior windshield haze is common. Pollutants from the environment and your car’s engine are drawn up from the intake vents, according to autogeek.net, and the result is a film on the interior windshield.
Mix one cup of white vinegar with an equal amount of water in a clean spray bottle. This is a glass-cleaning recipe suggested by mrscleanusa.com. Vinegar cuts through dirt and oily residue that many other cleaners won’t, and it is safer to use than ammonia.
Place towels over your dashboard to protect it from drips. Shake the spray bottle to mix the vinegar and water.
Put on safety goggles so spray does not get in your eyes. Spray the interior of the windshield liberally with the vinegar-water mixture.
Wipe the windshield with clean, dry microfiber cloths. Switch to the clean side, or to a new cloth, whenever one side gets soiled.
Spray the windshield again, if necessary. Dry it with dry microfiber cloths. Repeat this cleaning any time the windshield looks hazy. You can use this formula on the exterior, too, if you choose.
You can also buy commercial auto glass formulas for cleaning the haze, but the vinegar and water works well and is cheaper. The vinegar odour will dissipate. To quicken the process, keep the windows rolled down for a while after cleaning the windshield.