I have a cpap machine and use it. I also have to use a chin strap to hold my mouth closed,as long as, I have all of this crap on, I don't bite my tongue. If, I have a little congestion in my sinus' then I jerk everything off in my sleep. That doesn't sound nice. I live in an area where sinus is a problem year round.
Vacuum the rug daily, use a Hepa filter air filter (good ones about $300)and keep the windows shut.
I have a patient who turns her air conditioner in the bedroom on for two hours a night and uses that to filter her air (it has a "fan only" mode). A humidifier or dehumidifier to keep the humidity to 30-50 percent also helps. so do antihistamines like benadryl at bedtime. Or cortisone nose spray (flonase, Nasalcort etc).