I have same issue. I turned my humifier down. I read that it should be set to half of oxygen intake. It's helped but still have issue but less. Not sure you have oxygen. Lol. Dentist says brush teeth before bed to stop bacteria and dry mouth. Who knows about that other than I should brush teeth before bed.

Hi everyone, I use a cpap machine as well and at times I wake up with a dry mouth due to my mouth being open. I have a face mask as the nasal mask pushed too much air into my stomach instead of where it was supposed to go.

So, I started using a chin strap and mouth tape to help to keep my mouth closed. It has done wonders for my dry mouth issues. While it looks silly, at least my mouth is closed and the air is going where it needs to go. I also dropped the humidifier down a bit as well, and that has helped a lot as well. Just a thought.

My dentist perscribed Prevident toothpaste for before bed. I am also a mouth breather.

I use nasal pillow and then chin strap to keep mouth closed.

I use dry mouth tablets. It helps but doesn't last all night.