Got my first CPAP a year ago . . . Airsense 11. I started with a full face mask then moved on to nasal pillows, because I disliked having my nose and mouth covered. I suspect I mouth-breathe due to nasal congestion, probable allergies, thus have gone back to the full face mask in the past couple of months. Believing the mask wasn't tight enough, I tightened it a couple of weeks ago, and it seems to be secure. It's trial and error with me. My pulmonologist's office is so busy, I don't feel I get the attention needed. Oh well. Suggestions?