This was my first hot air brush, and it worked quite well for about two years. Then one day as I was using it, it shot sparks out the handle and tripped the GFI. Hoping it was a one-time event (maybe some hair had been sucked into the motor?), I continued to use it. Another week passed before the same thing happened again! My best guess is that torque builds up where the brush attaches to the main body when you use the brush, so something inside must be moving or getting compressed as you're brushing. I was sad to have to toss it, but hair and fire don't mix!