First breathe on the outside lens to create moisture (we do not recommend the use of other liquids). Using a micro fiber cleaning cloth, wipe the outside of the lens rubbing lightly to remove any dirt or smudges. Should the inside of the lens require cleaning we recommend using the same cloth but DO NOT wipe the inside of the lens. Blot the inner lens so as not to interfere with the goggle’s anti-fog coating. 

You’ll want to take special care not to rub the lens when it’s wet. Here’s why: before a goggle lens is assembled the inner lens material is coated with a liquid anti-fog treatment that permanently adheres to the inner lens surface to help prevent fogging. When this anti-fog treatment gets wet, it becomes soft and can become scratched if rubbed.  This is true of almost all good quality googles, like the ones EXIT real world sells.  Some people ride with a backup pair of goggles, so when they eat it and the goggles go flying, they just pull a swap for the new pair.  Thats what that goggle pocket in your jacket is for.