Well here in NY it sure feels like summer is over and fall is here , and before we know it winter will be a knocking. I plow with my truck in the winter and what really gets me is that the rear window will constantly fog up(super cab short bed with tonneau cover closed).Has anyone found a rear defogger system that can be wired up to the back window without having to replace the glass.I thought that maybe someone had made a 12 volt system i could hook up to one of the upfitter switches.Also I have the sliding rear window.Any thoughts on this ?..Thanks