Thanks, that's interesting. I can remember falling asleep under a tree with a light summer breeze on me in days gone by. I occasionally sleep with a fan on me now to help with night sweats, but my c-pap mask covers so much I doubt enough breeze gets to my face!

This won't help everyone, but one thing that can knock me out really fast (usually under 5 minutes now) is some kind of massage or other physical stimulation (vibration, rocking, whatever). It only needs to be a small contact point/area on a hand, arm, foot, leg... I would guess it's from some kind of release of endorphins combined with a type of self-hypnosis. It began when my wife tried to help alleviate headaches or other pain by massage, which gave me something to focus intently (and intensely) on & hence bypass the pain signal. Over time (practice) very little is required. If we're lying in bed she can just rub my forearm with her thumb for a few minutes and I'm out cold. Touching the fan with my foot or resting my hand on the c-pap (vibration) can do the same thing (but there's a lot to be said for the human contact).

HTH,

Doc