i use a hair dryer too. if you just leave it out, it will heat to room temp then stop. the snake will have trouble finding it if it is the same temp as the rest of the room. warming them in water works but some snakes don't like to eat them wet, not sure why. i like the ziplock bag idea but haven't tried it myself as the hair dyer is so easy to do. we heat till about 100 deg, then it is significantly warmer than room temp and the snake finds easily