The best mask cleaner I have found is Glass Stovetop Cleaner. This product is designed for cleaning stuck on food and other stuff, and will not harm the glass. This was recommended by a high end mask maker to resolve fogging issues in their $$$ masks. I have found that a good defog makes a big difference too. In my opinion the best commericial product is 500PSI, but we use a mixture of baby shampoo and water in a spray bottle aboard our boat and this works very very well.
I don't think it is a very good idea to spit in ones mask. Saliva contains a lot of bacteria and a "pink eye" infection is a possible outcome of this. I'm as "old school" as they come (diving for more than 50 years), but I won't spit in my mask.
I don't think it is a very good idea to spit in ones mask. Saliva contains a lot of bacteria and a "pink eye" infection is a possible outcome of this. I'm as "old school" as they come (diving for more than 50 years), but I won't spit in my mask.