The Quattro FX has an AIR cushion. To seal properly, that air cushion must be fully inflated. The more you tighten it down to stop leaks, the worse the leaks get. It's a natural response to tighten the mask when leaking, but it doesn't work. Instead, try the following:
1. Loosen all the straps and lay down in your bed to adjust them. If you have a mask fit feature use it, or try to make sure your machine is at its highest set pressure when you adjust your mask (turn off ramp if you are using it).
2. TURN on the machine so the air fills the mask cushions, do the "swing" to position the mask on your face (if you don't know what I'm talking about, go to the ResMed Site and look for videos which tell you how to fit the mask).
3. Use your non-dominant hand to GENTLY hold the mask in place while you hook and tighten the lower straps with your other hand, just enough to stop any leaks. Don't mash it down hard, the cushions must remain inflated.
4. Tighten the upper straps as little as possible to maintain a seal. The most important thing is to allow the cushion to fully inflate around your nose--that will prevent soreness and give you the best seal. Now turn to your side and adjust the mask if necessary to maintain the seal.
You might try a mask liner (Remzzz's or Padacheek or a homemade version) to help get a better seal and I also use an "anti-leak" strap made by Padacheek.
If these suggestions don't work, you have to be firm with the DME that they need to help you find another mask. You have 30 days to return the one you have--don't let them string you out until it's too late to switch.
Phillips Respironics System One Auto A-flex and Humidifier
Encore Viewer 2.0 Software