I have yet to find anything that works as well FOR ME as my own spit. If anyone wants I can send them a bottle to try. There is regular and heavy duty that requires me to eat pepperoni a few hours before.
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Mine seems to be the lite version, although when you're on a dive and your mask is fogging up, pulling it off and giving it a good licking can actually work wonders. Doesn't taste great, but the fogging problem goes away. (I have yet to find anything else that works as well *during* a dive.)I have yet to find anything that works as well FOR ME as my own spit.
I speak from experience, having seen it being used on a brand new mask in the Philippines, and a few months ago when I bought a new frameless mask, straight out of the box, Johnson's Baby shampoo on the lens and no fogging from the start until now