Using a special glass-ceramic cleaning agent produces the best results. We advise against using harsh or abrasive cleaning agents, dishwater detergent (concentrated) or scouring pads.
#4 Why is the hotplate not heating up and why is the heat setting flashing?
The hotplate on which the cookware is standing is not switched on. Check that you have switched on the correct hotplate
#5 Why can't I switch on the hob and why is the childproof lock symbol lit?
Noises may be generated while using the hob depending on the base material of the cookware. These noises are a normal part of induction technology. They do not indicate a defect.