How to prevent fogging when swimming?
The anti-fogging coating on inside lens will eventually faded, here are some tips for how to maintain the fog-resistance function of the swimming goggles:
Do not rub the inside of the goggles with a finger or towel. This method may cause damage and rub off the anti-fog coating.
Activate the anti-fogging coating of inside lens by soaking the goggles in the water before swimming.