I noticed that my windshield keeps on fogging up even on hot days. I dont think it's the windshield vent because it doesnt have that pattern coming from there. Is there anything I can apply on the inside of the glass? I think i tried using the rain x but didn't seem to help outl.

 

do NOT use rain x...

use simple window cleaner on the inside... the reason why it fogs is because there are micro particles on the glass that allow for moisture/fog to build up

heck.. if you just wiped it with a damp cloth it'll work

 

Make sure you are not using recirc mode. Use Windex to clean inside of your windshield.

Do NOT use Rain-X inside. It is for the outside. Some Lexus models already have special rain-repellent coating on the windshield.

 

Okay I wiped a little alcohol on a towel and cleaned the inside of the glass and no more fog.

 

I use "Invisible Glass", a Stoner product, with very good results... Pep Boys carries it.

 

told ya

 

are you talking about the thin layer residue that develops over time? Or just condensation on the windshield during A/C use?

Also, are you using Rain X the water repellant, or the fog repellant?