[Zeus]

Originally Posted by Sam2000

I've just invested in a Cressi Matrix, and obviously want to avoid fogging problems during dives. I've heard so many old-wives-tales about precautions, and I've followed some of them, but still I ended up with occasional fogging, for no apparent reason.

Don't bother with that stuff they sell as a pre-treatment, stick to toothpaste
Don't use gel toothpaste

That artificial spit works well as long as you're not left for ages before

Don't listen to tripe about "the greener the better" That's not only disgusting, it's bollox
IMVHO rinse first, minimum spit really rubbed in with remaining wetness, then very light rinsing again.
__________________
Never failed a course or got stuck on a ceiling - not without fly tape anyway