How could you honestly think that is was an infection that went away by itself? It's without a doubt a BA reaction, lots of people get it, including me. The best thing you can do is suck it up for now or mix it & get a different brand next time. Heating it wont do shit, mixing it will make the pain bareable. And if you've heated it to the point of melting the rubber, you've most likely ruined your gear.