[tahoeblue]

I think those may be good ideas yet they don't really gel with my experience. I have to agree that there are differences in tubes, or they would respond similarly. IF I take an antihistamine fro mucus it tends to backfire. The last time I took one I couldn't even clear on land. I concluded that it dried the mucus our a little and turned it into a sticky mass and my tube was glued shut.

Concerning turning upside down. When out of the water, I have hung over the back of the couch (not when my kids have friends over to the house). I can stimulate the same difficulty in clearing. It may be like snoring. When my weight is under 180 I don't snore. Being over 180 I only snore in the position of sleeping on my back. And so I think the clearing difficulty has more to do with a shift in body tissue with the head down. Maybe I should get back under 180 to see if there is less tissue pressing on the tubes.