This technique works really well. I used it on my atomic venom, which used to fog HORRIBLY. I had used toothpaste on it quite a few times, but it still fogged relentlessly. To the extent that I was willing to take a lighter to the most expensive mask I have ever owned! It worked out great...to the extent that my girlfriend even had me do it on her mask. She also had excellent results.
Check out this video - good demo of how to do it, and why it works
Mask De-Fog Lighter Trick - YouTube
There is no danger to the glass as long as it is tempered glass - that's the same stuff they use as glass in front of a fireplace enclosure. For the rubber, it doesn't get very hot as long as you are moving the flame around. It does get warm, though! I do strongly suggest letting the mask sit to cool and not dunking or rinsing it in cold water. That would be about the only way I can think of to actually damage the glass.
Best of luck!
Check out this video - good demo of how to do it, and why it works
Mask De-Fog Lighter Trick - YouTube
There is no danger to the glass as long as it is tempered glass - that's the same stuff they use as glass in front of a fireplace enclosure. For the rubber, it doesn't get very hot as long as you are moving the flame around. It does get warm, though! I do strongly suggest letting the mask sit to cool and not dunking or rinsing it in cold water. That would be about the only way I can think of to actually damage the glass.
Best of luck!
