It could be the air con system that is blowing moist air into the car.
But is the inside damp for any reason? I recently had the carpets shampooed so there were damp, the extra moisrure in the car casued the windows to mist up when the temperature dropped,
I just dried out the inside of the car by turning the heating up full and opening the windows, so drying out the carpets and letting the moist air out of the car. took about an hour on full while i was driving!! its a good idea to wear a tshirt and shorts /ubbthreads/images/graemlins/blush.gif
Ross /ubbthreads/images/graemlins/beerchug.gif