Thanks Bosco. Yes I've read the details about the vitamin combo protocol and the oxygen. Great info, though with oxygen, I surprised to read that you have to go through so much of it. I was hoping that a 3-foot (or so) tank would last for at least a month, if I only had one big attack per day. But even shaving off 5 minutes of the extreme portion of a CH would be wonderful. For me the most extreme clusters involve the high pain in the orbital/eye, and I think maybe the cold water/ACV swish localizes that pain to the upper gum section of the trig, or at least temporarily distracts from the other three zones of fire. Even placebo is effective, until it isn't!