10 Common Problems with CPAP Machines
Problem 8: Mouth becomes dry
For those who sleep with an open mouth or those who breathe through the mouth, dry mouth might become a bigger issue due to the CPAP device.
Solutions:
Use a chin strap
A chin strap helps in keeping the mouth closed during sleep. It also lessens air leakage for those who wear a nasal mask.
Go for the full face mask variety.
The full face mask style will cover the entire mouth, as well as the nose. This might work well to solve this problem.