I've been wearing a full face mask for many years. (I'm a mouth breather and I've never lasted more than a few minutes with my mouth shut.) I use the Quattro. I've tried others but I can't remember which and I gave up on them when I couldn't get a perfect seal. I would keep trying new ones, but it's...

I don't usually hear it over the constant air sound of the mask, but my wife is kept up by the sound the machine makes when I inhale, at the beginning of the night. It seems to calm down by the morning. Solutions? Do I need a new machine?