I have a Belling DB4 90DFT which I've owned for about 4 years and the most frequently used Control Knobs have been replaced twice already. I contacted customer services and received this response:
There is no design fault with the control knobs, the control knobs are all tested and passed by British Standards before being put on the cooker, you might need to get the cooker checked by an engineer it may be over heating.
Does this seem reasonable?
Is there a better compatible knob that is not so prone to breaking?