I found this video just looking around. I have tried it and it does work. I use Barbasol shaving cream and it even smells good,lol
I've done the inside car windows,storm door windows, mirror in the bath room and all have been fog free but it's only been a couple of days since applying it. I'll see how long it lasts, some say a few weeks while others say a few months.

I've done the inside car windows,storm door windows, mirror in the bath room and all have been fog free but it's only been a couple of days since applying it. I'll see how long it lasts, some say a few weeks while others say a few months.