I have 2 Hondas with the same problem (an Odyssey and a Civic): the windows
regularly fog up in the fall/winter. When one puts on the defroster, it's
"AC On." If it's like regular air conditioning, this means the gas mileage
drops. I've even tried the "anti-fog" solution, but that doesn't work well.
Any ideas? Please feel free to email me directly.