I'll have to use the mask with my mouth open here in a bit to see how fast it dries my mouth out.
I'm normally a side sleeper, 90% of the time. Only on my back at the beginning of trying to sleep.
I believe my sleep study showed higher apnea events at REM, but I don't have the data.
I'm going to boost my pressure tonight by 1 unit tonight.
The sleep dr thought I eventually might need to be around 11cm. I'm currently at 8cm and started at 7cm 3 months ago.