Goggles and eyeglasses have a horrible habit of fogging up. Especially after you've saturated the foam with sweat. Even thermal goggles fog up too under hot, humid conditions. I recommend that everyone build a fan to defog their goggles. But that costs about $25 and there are a lot of cheapskates out there in paintball land. So try this, home made no-fog spray.
Materials :
Spray bottle
Baby Shampoo (tear free stuff like Johnson's)
Water
Directions
Mix a solution of water and shampoo. I recommend anywhere from 5:1 to 10:1 (water : shampoo) in the spray bottle. You can experiment with different strenghts of the solution for best results.
Spray the solution on you goggles or eyeglasses and wipe off any excess.
I provide no guarantee of success. Success is up to you. This no-fog spray is used by SCUBA divers around the world, but even under extreme conditions (high heat and humidity) even this will fail. So don't count on it as being a fix-all solution because there is none when it comes to keeping goggles fog-free. Except using a combination, fan, spray, and thermal lenses. Even then you still run into the occasional foggy lense.
Good Luck
