We bought our '09 T&C a year ago and were surprised how foggy the windshield gets in cold weather. We forgot about it this spring/summer, but now are reminded as the temps are starting to get low again. Running the defrost 100% of the time only works enough to keep the area immediately in front of the driver and passenger seats clear while there's still noticeable fog around the perimeter restricting some viewing angles. I've seen some anti-fog sprays for sale but they have mixed reviews. Does anyone have any recommended treatment for the windshield to keep the fog at bay?