Coriena W Mcdowell , VA December 25, 2016 Knob teeth wore off Just popped the new knob on and back to normal. I was a bit annoyed because the knob timer came with a clip, but it doesn't say that anywhere on the description, so I ordered a clip, too. Only $3, but still, I didn't need it and it's not worth sending it back. 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes