defrost

Too much interior moisture? Look for leaks. You could also use a chemical moisture absorber to dry out the cars interior.

my sun roof is like an icicle .but once im idling for awhile it will defrost. I cant seem to travel anywhere unless my one window is left open a bit but then it gets really cold in the vehicle on my legs. I don't understand why it will defrost when idling but not when travelling a distance

I know on my vehicle, different year--make--model. With heater on, may vehicle side windows fog up real bad. I roll the windows down, the inside fog goes away, doesn't take long. I know, hard to roll windows down when it's freezing outside, but, it works for me. Maybe I could just turn the heat control down? I don't know? I haven't tried it.

Heat only vaporizes the moisture but the moisture stays in the car. Like oily says opening the windows can help get rid of the moisture. When I snow plow I have to keep the defroster blasting while keeping a window open an inch or two.