Hello Forum, I have been using an APAP for six weeks now. I am using the AirFit P 10 nasal pillows. Things were going great for some time, after which I noticed that the APAP was off a couple hours into my sleep. Like, I go to sleep at 10 and wake up at 5 in the morning, but the machine would have worked for 2-3 hours and turn off. Getting worse by the day, it seems to work even less now. This is even making me wake up with a dry mouth. Obviously, I must be breathing through the mouth in my sleep. What could be the problem here? Has anyone had this sort of an experience?