As a dentist who deals with sleep apnea, I find that some people cannot handle taping their mouth shut as it makes them feel like they might suffocate. I invented an internal oral adhesive strip that alleviates dry mouth and helps people get a good night's sleep by reducing the need to get up and drink water, then again to pee, and bothering their partner. The strips are available here: https://www.breathificdental.com
Same thing goes for dental fitness, "burning plaque" and "remineralizing (building) tooth enamel" -- Work Smarter.