Originally Posted by PuyallupCoug
Try running your A/C when you get moisture/condensation in the car. A little known characteristic of Air Conditioning is that it actually de-humidifies the air. Don't worry, you can still have the heat on at the same time as A/C doesn't necessarily mean "cold air".
A lot of foggy windows in the wintertime can be solved by simply activating the A/C.
Defrost in our cars automatically turns on the ac. You could always try some anti fog treatment too.