[jph00]

I couldn't find a CPAP mask that worked for me, even after 6 months of trying across 4 different masks.

Then I read studies showing oropharyngeal exercises can help treat sleep apnea. Originally I used https://snoregym.com/ for that, but then I switched to simply chewing gum once a day (being careful to chew on both sides of my mouth roughly equally), and also chewing my food a bit longer.

It totally cured my sleep apnea.

[mrguyorama]

How come none of the masks worked?

I was fully prepared to have to go through the entire gamut of masks to find one that worked, because I snore so surely I would need a mask that covers my mouth at least, right?

But even while sleeping, my brain is keeping my mouth shut so the simplest, nose-only mask works perfectly, with very little leakage.

[ElijahLynn]

What was your severity of sleep apnea? Do you mind sharing your AHI?

[Lucasoato]

Have you tested it with a polysomnography?