Product review (1 stars): Endure, save, and buy a new oven.
I agree, in part, with the other reviewer.  The knobs on our original KA oven starting giving out after 3-4 years, so we did a full replacement with these.  Two have succumbed after 8-9 months of use - so obviously worse than the OEM.  We hypothesize that heat from the oven actually accelerated the degradation process, so we are thinking of keeping them off (also good for the kids) while not in use, but that is a royal hassle.  If i had any business sense I would open up a custom knob website and make aluminum knobs.