Stopped working on 3rd use. First time - worked fine. Second time - upon pushing the button, some settings didn't work. Third time - wouldn't turn on. I tried replacing the batteries. Strangely with one battery out and two still inside, it started vibrating based off a seeming contact made between the battery tilted towards the sides by my fingernail. Replaced all batteries with new ones, it's completely dead. Total waste of money.