Here's a product idea that came to mind, which could potentially (that
key legalistic word) lead to millions.

idea: Create a system or material that will not fog underwater for
goggles and masks.

This, as simple as it sounds, has not been done. The closest things
are the scuba masks which use tempered glass, yet still do fog even
with anti fog spray. Thus for the need for "clearing" the mask
underwater.

And, the industrial scuba helmet, which uses air spray to keep the fog
off the window.

If you could develop something like that, I will be your first buyer!
ALl my years of swimming, and I haven't found the solution yet!
Tempered glass mask is the best I've found, but isn't streamlined for
swimming and it still fogs.

-Tikiwolf,Hawaii