Well, is is no consolation that my problem is not reactor related. It is all mother nature. I work at a lab that provides service to power plants - no reactor here. The radon is all natural. It is everywhere, some areas more than others. Sometime back, it was discovered that a rural subdivision's well water was somewhat radioactive. After they pointed a finger at another (not where I am) nuclear service facility, some testing was done. Turns out the wells were sunk in an area containing natural uranium ore!OK, so we have a reactor about 25 miles away in Hartsville, SC and that's the direction I usually ride, and now I have to worry about contaminated beads of fog. ;-) We don't have fog very often and it burns off fast.
Same here. I just use the same McGuire's wax on my visor as I use on my bike. And for the inside of the visor come winter time, I put some shaving cream on a piece of paper towel and wipe it on the inside of the visor until it is dry and not streaking. Prevents fogging on the inside.I use the same wax as I do on the painted surfaces. The water just rolls off as the wind blows across the surface.