Question: How to Clean Inside Car Windows?

Can I use Windex on the inside of my windshield?

Just like with using a sponge to clean your car’s glass, using a towel to dry the glass can scratch the surface.

For instance, many Windex products have ammonia, and though you can use Windex on regular windows and mirrors, you shouldn’t use it on your car’s glass.

What is the film on the inside of my windshield?

The film you see is created by all the plastic that’s inside your car. When your car is out in the sun, the sun heats up the interior to 130-145F or so. This heat creates off-gassing of the plastic dashboard and all other components. The plastic molecules get into the air and then settle on the glass surfaces.