Hm. Not sure what that is, but I get a similar reaction when I stick my hand in the skimmer well to retrieve the basket sometimes. I haven't got that as a result of swimming. I chalked it up to an allergic reaction to something that was skimmed off the surface of the water, and concentrated in the skimmer well.

Heh, not much help here, but a similar experience. Doesn't happen all the time either.

Michael