Product review (1 stars): Bad design will fail in short time.
This is a defective knob design. The knob is made out of plastic and the hot air from the oven will result in cracking of the plastic stem and pealing of the metal finish of the knob. I have had 2 set of stems and they fail in 1 or 2 years.  LG should be ashamed for this part and not recalling it.