groundzero

who uses what and how do you like it? it's getting cold and time for me to start using some.

Ubetit

All the anti-fog stuff i've used makes the light hitting the windshield prismatic. it drives me nuts. The AC works best.

Jonanator

I know rain-x has a product that claims to be "anti-fog". It is specifically for inside of your windows. I bought a bottle, but never used it before.

JackS

I don't know whats in the anti-fog products that would prevent fog.
Keep the inside of your windows exceptionally clean may have the same effect.

HomeChicken

I'm assuming the anti-fog products are similar to the treatments used for snorkeling. When I was a kid, I never found that the anti fog snorkels worked all that well. I always ended up spitting in the goggles to prevent them from steaming up. Though I wouldn't recommend spitting on your windshield

slanguage

keeping windows as clean as possible is the best bet.