I'd like to add....if anyone has one and refuses to use it...let me know what you'd sell it for!! (Money for you to buy more stash!!!) I'd take one to my daughters where I spend nights occasionally, and perhaps another just in my car or to work in case I got stuck at work over night due to bad weather.
Perhaps you don't use it because it dries your nose/throat...do you have a humidifier on it? Is it working proficiently? Take it in and have it checked! Maybe you need new/different headgear. There are many different types! I'd never take a nap without putting my c-pap on!