Todd had his number on the bishop blog website I believe, you can give him a call, if he doesn't pick up leave a message and he'll get back to you. But if the bishop is new, they have a break in period in which they'll get warm. I've actually burned out the diode on mine before, I believe cuss I was bending my needle, but with the needle clip you don't have to bend the needle because it causes too much friction with your needle and tube, which may be working your motor too hard and causing it to heat up.