I had problems with fogging until I used the FogDoc system. One coat of the gel on the inside of the lens, clean the outside with the liquid and cloth, no more fog problems!
I am a heavy face sweater and I wear Sly Profits, so you can tell it really does work.
EMPIRE AXE - REDLINE OLED
LURKER EIGENBARREL - EIGENBOSS BOLT
CRITICAL AXIOM TRIGGER - NANO FEEDNECK
EMPIRE Z2 - NINJA 50/4500