mask maintenence

So let me set the scene for you: You're on a liveaboard getting ready for a dive. You hook up your first stage to your tank, tighten down the yoke, slowly turn on the air. All of a sudden, you hear a pop and a slight hissing. Uh-oh! You turn the air off, slowly purge the system, loosen the yoke...

I am a 69 year-old lifelong pool lap swimmer, and recently purchased a Tribord full-face dive mask. Great for distance swimming as I can concentrate on the exercise without turning my head or raising my head above water. Very zen. The problem I am having is that the mask and snorkel work fine...