I have a similar problem with my ResMed FFM I wake up with my tongue glued to my mouth. I have the humidifier set to auto and when I increase the setting manually I end up with water bubbling in the tube. Then I get up go to the bathroom drink water and cannot go back to sleep. Very Annoying!!
I have been using the ResMed 10 for almost 2 years. During the first year I was sleeping 8-10 hours maybe getting up once. I never had any difficulty getting back to sleep. Lately I sleep 5 hours wake up and cannot get back to sleep no matter how hard I try. I'm not tired during the day I'm wondering if my body is now used to less sleep.
