It's falls off us all or watching a move and forget to put on. But I'm just glad to hear your using it. Lot of people don't give it a chance. If they did. Even if annoying it helps in many ways.
Ive been fine for a couple of years w/ my CPAP.
Lately Ive been removing it during the night I notice. I think from blocked / stuffy nose.
My new one is on the way (Phillips recall) so hopefully I go back to not having issues.
Since Ive been using this replacement one (Resmed) while I wait on Phillips, its been a bit of a challenge.