I have a 2002 Cavalier and for some reason my windows are fogging up on the inside of the car. My mechanic was unable to find any problem with my blower, heating rad and duct work.
When I am driving on the highway the back windows have to be left down a small amount to get the air to circulate and defog the windows. My front windshield takes a long period of time to defo also.
Does anyone have any idea what could be the problem?