easiest way is to go back to your DME, the ST isn't set up properly for you. The waking up short of breath is telling. You may finish up back at the doctor for a script change. If you have a physical problem, obesity, copd etc, then the ST is the right choice. If it's a brain signalling issue and there are a lot of central apnea. Then if your heart is ok, an ASV is more suited. Get a copy of your sleep report. You may need another sleep study to sort it out. If you are self funded, probably apneaboard forum could help you with self diagnosing.
If they hand around in large numbers, you move to a bipap and then onto an ASV. For 2 thirds of people, the CA settle down within 3 months on cpap.
Just a chin strap or a headband put under your chin and over your head. You just need something harder to get the mask off. The sleepy urge to take it off, will settle down as you continue cpap.
Psychologically, it's been studied about an object. Those that buy it reinforce positive reasons, those that don't reinforce negative reasons.
If you have a germ phobia or an anxious person. It is reassuring and good. For the rest, a wipe with a wet tissue and a wash once a week is enough. There is nothing on the mask, that isn't on your pillow case and you live with everyday in a symbiotic relationship.
If I was on fixed 15, I wouldn't hesitate to go to auto 13-17, As has been said, get sleepyhead.
A lot of people are sent home with an auto cpap, with settings of 4-20