Foggy in Minnesota

I have a '86 5000 CS with over 200k miles. In winter the defroster barely keeps up keeping the glass clear; especially backseat glass. If I go thru one of those automatic carwashes with the high pressure, high volume air dry, the inside windshield glass condenses water vapor something fierce on the way home. Any body seen that before?:frown:

do all the speeds on your blower motor work?