What can be done about windows that don't defrost in a 1996 Ford Windstar?
If the air coming out of the defrost isn't hot, your heater core may not be functioning. Also, coating the window with an anti-fog formula like Rain-X (sold at PepBoys and the like) may help keep moisture from clinging to it in the first place. I've also found that a credit card is helpful in scraping the inside of windows. try running the heat with the a/c system on, as the a/c removes water from the air, which would normally fog up or ice up the inside of your windows