I've been enjoying commutes in downpouring rain, but have one weak spot, my eyewear. I have several different lenses, and ususally wear the gold or clear lenses, but they fog up. It gets worse when I stop, and clears up a bit when I'm moving, but I end up looking over the tops to make sure I can see. This only tends to be a problem when its below 60f.

Any tips or tricks to keep the fogging under control? Keeping the rain beaded on the outer lens vs. smearing would be a plus, too. I thought of RainX, but wonder if anyone has tried it.