I've been using commercial antifog spray.
I was tired to spend such a lot of money in just a little bottle, so, searching here I've got the magical formula of the antifog :
1/2 Johnson&Johnson baby shampoo + 1/2 medicinal alcohol.
I re-used a little spray bottle and woala !
Spray a little in each lens of the mask when it's dry. Spread the mixture with your finger tip and rinse with sea water.
This will be enough for the whole dive.
I was tired to spend such a lot of money in just a little bottle, so, searching here I've got the magical formula of the antifog :
1/2 Johnson&Johnson baby shampoo + 1/2 medicinal alcohol.
I re-used a little spray bottle and woala !
Spray a little in each lens of the mask when it's dry. Spread the mixture with your finger tip and rinse with sea water.
This will be enough for the whole dive.