Ok, so I was at the hardware store the other day getting rain-x for the jeep, and I noticed this interior rain-x stuff that prevents the windows from fogging up. I got it because this is a really big problem for me, and I put some on the windshield of one of our ambulances after I got done with the jeep. Then, the rescue chief suggested I try putting it on the inside of the visors on the rescue helmets. That got me thinking- do you think it'd work on the inside of a diving mask? Has anybody tried it before?