Originally Posted by 5thAve
Is it condensation? I've had that problem depending on what it's like outside. During the day it looks normal at night if it's starting to get cool out it starts to fog a bit like that. I had that problem last night.
If there's a minor heater core leak or a bit of condensation from the AC in heater box that can cause the problem too.
This is what I thinking. Heater core or a/c evaporator leak if car is equipped. Definitely will fog a window up like that


Facts are stubborn things.