Anti-Fog Spray
Here are the plans on how to make a very cheap and yet very good anti-fog spray and goggle cleaning solution. This works great on your lenses! I used to use this all the time to keep my lenses from fogging up! I got this recipe from some scuba divers! They used this to keep their lenses from fogging up!
Materials: Spray bottle, baby shampoo, and water.
Directions: Mix the water and shampoo together in a ratio or 5:1 or 10:1 water to shampoo. Put the mixture in a spray bottle.
How to use: Take the spray bottle and spray a liberal amount of liquid on the lenses of the goggle take a soft towel and wipe off the paint goo and excess spray. I don't know if this would affect your lens's warranty.