I might have apnea. I wish I had it diagnosed when I had health insurance. I use a transparent rubber snoring clip, it’s inexpensive and can be found on amazon. It stops my snoring but I still sleep with my mouth open. I feel good reading the posts here; perhaps I might have apnea and not ADHD? I remember being 8 and reading encyclopedia volumes from front to back, whereas now (i am 36) my attention is not good, and is far worse after a night of inadequate sleep.
I did Michael White’s breathing exercises yesterday, and I noticed that I woke up in the middle of the night with my mouth closed and with no drool on my face or pillow!