StefinSB
Contributor
I am sure Hollis had the budget to do a full on forensic on a few dive masks ....... in any case, the point is not to melt the glass (which a lighter wouldn’t be able to do anyways) but to gently burn the film of organic residue on the glass.Never never never use a lighter to burn off the coating . Full stop ever.
The glass is heat treated and using an open flame to remove the residue will change the temper of the glass and VOID YOUR WARRENTY.
Use toothpaste or another suitable cleaner . Do it several times.
Hollis wernt through a big investigation surrounding broken glass and the end cause is exposure to heat from open flame.