I had a curious reaction I attribute to PB Blaster. I was using it to clean parts on a lawnmower I was working on one evening, so I my hands were exposed to it for a prolonged period (I know you should avoid solvent exposure...). The next morning, I had one whopper of a nasty, sharp headache. It was like a bad hangover with none of the joy of an evening of drinking. Anyway, my two cents, avoid prolonged contact.