Is it a nasal mask or a “full face” mask (that covers mouth and nose)?
You can always try different masks. A chin strap might help also.
The lung / gunk is unpleasant for sure and makes it that much harder to deal with CPAP. I’m fighting a cold this week and the minute I lie down, it’s pudding-lung time!
Full face–can’t get enough air through the sinuses inbound or out. Nephrologist got my blood work, and Moanday’s appointment abruptly got moved to tomorrow morning. What was that curse about living in interesting times?
The obvious answer is “Sleep on your back with a sleep apnea correction device”; CPAP doesn’t care how you sleep.
Of course, that all assumes that sleeping on your back actually IS the best way to sleep, which probably depends on which study you read.