Maybe your helmet is lacking adequate venting. Add some to your goggles by cutting some 1/4" squares of Styrofoam and superglue them to the top of your goggles for a bit of breathing room. However, beware of appearing less than steezy.
self inflicted gaperdom
"People say that marijuana smoking is going to get in the way of my career. I say to them that on the contrary, my fighting career is getting in the way of my marijuana smoking." -Nick Diaz