You're still using it?!
I'm not using the bad one though. The one that smells and blackens face masks. Only the other one. I regularly let it blow into a mask for a day to verify.
I used to wake up with really painful teeth and I also felt them starting to misalign. Like they were pushing my teeth around like braces.
Supposedly you can "train" your tongue to stay in position with tongue & jaw exercises, but I saw no effect.
It's annoying that they're so restricted here with all the medical red tape. They can't even go high enough to do actual damage. It's not like a respirator.
Or do they take foreign prescriptions too?