I got the Zanfel. It's a cleanser, with little beads of polyethylene in it (and other ingredients I have not heard of before). You rub it into a paste and rub it into the affected area for one minute. Then wait thirty seconds. If the itch is gone, rinse thoroughly. If not, rub another minute, then rinse.

I tried it on the worst two patches - my face and my arm. They feel MUCH better already. There is a little bit on my chin that is still touchy, but the rest feels (although it doesn't look) normal. I can do that chin part again in a couple of hours if the itch returns. The patch on my arm is still leaking. Ugh. There are few things that seem more disgusting.