Also, you may want to shut the ramp thing off. I hated it. Once you shut it off, there is no more surprise. You turn it on, you get air, you go to sleep. I am on my second machine, after killing the first one after 10 or so years. The guy I meet with is amazed- I average 99.9% compliance. The .01 that I am not coincides with power outages. I can't imagine my life without it. I sleep better, feel better, have more energy, etc. Mask is key though. That swivel thing Irwin posted is also key.