I am a side sleeper. It seems normal that I create an air leak every time I roll over. When the machine detects the air leak it ramps up the pressure to compensate. That makes the air leak worse so it ramps up the pressure even more, which makes the air leak worse. Once the air pressure gets to 40 cm the machine kicks off. So far everytime the machine turned off I took off the mask but last night I slept all night with the mask on and the machine off. That has me very sick today.