ok i'm not to sure where to start here. when it is cold out my two passenger windows fog up on my 91 sedan deville. it is driving me nuts. the defrost seems to work but doesn't help these. i was wondering what could possibly be wrong..maybe if there is an air inlet in the front of the car...where outside air can get it..maybe the air inlet if it has one is plugged but i don't know what else would stop the problem..any tips ideas fixes would be appreciated.