10 uses for toothpaste:Number 8: Fog Proof Goggles: Rub some toothpaste on the inside of goggles and then rinse to have fog free goggles for swimming.[Link]
Almost all goggles manufactured by the prominent brands have an anti-fog coating on the inside of the lens. This is a coating that is hard when dry and softens when wet to provide the anti-fog properties. Touching the lenses when wet or rubbing with a towel will damage the anti-fog coating. I think that it is safe to say that putting an abrasive like toothpaste on the inside of your goggles will not only remove anti-fog, but will also scratch the lenses.I would not recommend this.
Paul,The anti-fog that the manufacturers apply a wears off in about 3 practices...not useful when you need goggles to last for 3 months or more. I still stick to the tried and true 'spit in the lenses' trick.
Shampoo works better than spit and keeps them fog free for the next workout.
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