All good advice, save the purge mask as a last resort.
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Get a new mask....
I have a fairly heavy mustache & have found that shaving the top works, if you can remember to do so.
I switched my mask to a Scuba Pro crystal view & have had no leakage. I don't have to shave it or grease it....
You all couldn't be more wrong! Ever held a cup upside down underwater? Hair on the head causes leaks, wrinkles, bad seal on you forehead cause leaks! But something on the bottom of the cup / mask won't cause a leak! I have been diving with some kind of facial hair for 37 years! So unless you swim upside down all the time don't blame your hair!
So how does this cause a leak? The only way to leak is to have Air escape from the top of the mask!
Papa Bear, you make a very good arguement. But I can actually feel it trickling into my mask where it makes contact with my mustache. Only a little water leaks in barely enough to fill a thimble but enough to be annoying. Like someone else said it is good for clearing your mask if needed. Thanks again for your input.
Just like the upside down cup water can't get in if air doesn't get out! Masks leak from the highest point! If they leak air water will come in to fill the space! So if you stop the air form getting out no water will come in, simple physics! A soft skirt helps or Cologne or Botocs might help? Certainly more than trimming your Mustache!