I'm a mouth breather, use a full-face mask, and my phone app showed a lot of snoring (up to EPIC)! So, I started taping my mouth and it has worked.
So, I put a band-aid over the top of my nose because the mask makes the bridge of my nose RED, I tape my mouth and then put the mask on. Thank goodness I sleep alone and no one comes breaking into my house -- they'd leave just at the sight of me.
MY PROBLEM! And I know I have to keep my headgear tight to prevent air leaks, my head is sore! I use the velcro straps on part of my headgear, which really helps. I wish there was some kind of padded cap to help with other straps cutting into my head. I just CANNOT loosen the headgear -- so I need help!!
I switched from full-face to the nasal mask (not pillow) and it was so light and felt so good but it wasn't secure -- I would move my head and the mask would move as well -- caused too many air leaks. So sad because it didn't hit the top of my nose and the headgear wasn't denting into my scalp. I returned to the full-face (F&P Vitera).
Good luck ... this has been a battle.