Mouth breather here, always waking up with desert dry mouth. I've been mouth taping for a couple years now, including a couple of hay fever seasons. Love it. Even with my allergies, somehow your body knows to keep one nostril open, or knows to breathe out of a corner of your mouth. https://www.mrjamesnestor.com/
I think they are a virus that flares when immunity is weakened. Good, real, sleep, and healthy gut, are underrated keys to strong immunity. I've never done it, but maybe try a sleep tracker app?
Tape is amazing. I love these simple effective hacks with tape.
Tape cured my plantar fasciitis: took all the tension off the ligaments and let them heal. This website heelspurs.com (which doesn't come up in search engines I had to remember it) is where I learned about it.
