Summer is here, and it seems to have brought me some problems.
I seem to be getting heat rash from my tfillin shel yad. During, and for another half hour or so after davening, my arm gets all red and itchy where the tfillin are, and even between the straps.
I don't think this is an allergy, because it's very recent with the heat, but i suppose it's still possible.
Any ideas on how to prevent/reduce the rash, while still wearing the tfillin halachically?