Abbey Supply are known for their gas used by airsoft players, but they also do supply anti-fog products for use on airsoft equipment and SOCOM Tactical has a video showing you how to properly do the job of using the anti-fog spray... "If you’ve been playing airsoft for any amount of time, you’ve probably experienced fogging. Fogging occurs when the hot, humid air from your breath condenses on the cool surface of your eye-protection or rifle sight.