Overheating or prolonged use may cause injury, including burns. Heating beyond the suggested time may also damage or destroy your Therm-O-Beads compress. If you accidentally heat your compress beyond the recommended time and see it inflating like a balloon, immediately turn off your microwave, wait for it to cool down, and then carefully check to ensure that the compress it still intact. If your pack has been overheated and shows any signs of deforming, dispose of your Therm-O-Beads compress immediately. Therm-O-Beads compresses may explode like a balloon if heated for an excessive amount of time