(04-12-2014 12:09 PM)robysue Wrote: Your profile shows that you are already using a full face mask. You need to reread the fitting process carefully. Make sure the straps are snug, but not tight. If the mask uses an air cushion (like all the Quattro masks), you need to fit the mask while you are laying down in your sleep position and with full pressure --- as in 15-17 cm NOT 8cm. The cushion must be able to fully inflate in order to seal well, and overtightening the straps will prevent that. If you are using an air cushion mask, check out JanKnitz's fitting tips in her blog entry Taming the Mirage Quattor
Also make sure your face is both clean and dry before you put the mask on for the night. This may mean that you need to wash your face well before bedtime. If you have a heavy five o'clock shadow of beard stubble, you may also need to shave in the evening too.
JanKnitz's tips are great and directed especially at the Mirage Quattro. I would like to issue a word of caution. The common consensus for air cushion masks is the oft repeated not to tighten the headgear too much. I think it makes some of us a little too tentative when it comes to the Mirage Quattro. The Mirage Quattro is a beast that needs to be tamed with some degree of firmness. Another thing about my Mirage Quattro is that the headgear tends to relax some during the night so the fit is looser in the morning than it was when I put it on at night.
I have not found any difference in leakage whether I am freshly shaved or my beard is three days old but that may just be my whiskers. I do have a short goatee which is present all of the time. It is logical to think that whiskers would interfere with the seal but I have found that with the air cushions it doesn't make as much difference as one might think. I have tried several different masks with air cushions and none of them have leaked where the cushion crossed my goatee. Even the nasal mask where the bottom cushion went all the way over the mustache part of my goatee did not leak there. This may all depend on what your particular facial hair is like, so it is probably best to test it for yourself.
I am not disagreeing with Robysue's comments, just amplifying some of them a little.