I've never had issues with Grillz fogging which is why I asked the question. It's only because of hearing about others experiences with them that I wear the JTs for marshaling. I've always been expecting to mist up... Probably a reflection of the time between "game on" and me entering the dead box!Haven't tried them but i don't know why they didn't make them years ago. Thermal lenses are the only way to go and the only reason I never bought Grills, anyone i saw wearing them PRIOR to the thermal lens release ALWAYS had issues with fogging before the day was out.
I think you're right, they all seemed ok when brand new, then a couple of washes later and the problems commenced.It wasn't the fogging up it was the anti fog layer used to start peeling off forcing you to buy new lenses!