Last night here in Portland it was moderately cold and very foggy after nightfall. I noticed that when I went out to my car my winshield had a good layer of condensation on it on the outside which obscured vision from the inside. All the windows all the way around in fact were nicely coated. I looked around at all the other cars (all modern, less than ten years old probably), and almost none of them had the same build up of water on them. Many of them were quite clear of any build-up at all.

So... I was just wondering to myself as I drove off and used my wiper blades as well as waited for the inside defrost to clear things up.... what is it with the composition of more modern glass that prevents the same ammount of build up of water on them? Was some advance in glass chemistry made? Do they coat modern glass with some anti-fog compound now? If so... has anybody found some kind of spray-on stuff that will cut down or eliminate the pre-drive fog-up?