won't see this. First, as with a lot of things in diving, whatever works for you, works for you. As an instructor with close to 5,000 dives now, I have to take off my mask/teach it all the time. What works best for ME, and most of my students, is to 1) have your face slightly down when you flood the mask....just like swimming the crawl stroke, if you're face down, you don't get water up your nose. 2) take a BIG breath...through your mouth, of course...and SLOWLY AND CONTINUOUSLY exhale out your nose. This can be done while either a) pushing in at the top of the mask, as is shown in most training videos I've seen or b) the way I find works better, slightly loosening/opening the lower part of the mask. Once you get good at it, you can open the mask out far enough to get a finger in and scratch your nose, whatever...but just slightly loosened is best for beginners. Keep you face slightly down, while exhaling, until almost all the water is gone...then, as you STILL exhale, slowly raise your face slightly upwards to get out the remainder of the water. Make sure you begin exhaling JUST before loosening the lower edge of the mask, and CONTINUE to exhale until just AFTER "closing" the lower edge once you've gotten all the water out. A mistake I sometimes see is divers clearing the mask ok, but then leaving that lower mask skirt "open" after they've finished exhaling....allowing water to get back in.
A couple final points: 1) all you're doing is putting air into the mask to DISPLACE the water....if you take an upside down glass full of water with you, (underwater) and breathe a few bubbles of air into it, you'll see that the bubbles force the water out just fine....and they bubbles aren't "forcefully" entering the glass.
2) your lungs are a lot bigger than the inside of your mask. As long as you remember to take that big breath BEFORE trying to clear the mask, you should have plenty of air to clear the mask easily....I know I can do it a dozen or more times on a single breath.
Good luck, practice in a safe, shallow place until you DON'T worry about it...that's the only way it will ever become 2nd nature and you'll be able to do it safely if your mask is flooded accidentally during an actual dive. Most of the serious/potentially serious "diver bolting to the surface" situations I've seen have been from divers getting a bit of water into the mask & panicking. Diving is safe....divers are dangerous!
Chris
www.letsdiveguam.com