Miele CS 1212-1 Operating And Installation Instructions page 19

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Do not allow either solid or liquid sugar, or pieces of
plastic or aluminium foil to get onto the cooking zones
when they are hot. If this should occur, switch off the
appliance, and carefully scrape off all the sugar, plastic
or aluminium residues from the hob whilst they are still
hot, using a shielded scraper blade.
Take care not to burn yourself.
If residues were allowed to cool before being removed,
the ceramic surface would be susceptible to pitting or
even cracking.
Clean the appliance once it has cooled down.
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When using an electrical appliance, e.g. a hand-held
food blender, near the appliance, ensure that the cable
of the electrical appliance cannot come into contact
with the hot appliance. The insulation on the cable
could become damaged, giving rise to an electric
shock hazard.
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This appliance is fitted with a cooling fan. If a drawer
is fitted directly underneath the hob, ensure that there
is sufficient space between the drawer and its contents
and the underside of the appliance in order to ensure
sufficient ventilation for the hob. Do not store pointed or
small items or paper in the drawer. They could get in
through the ventilation slots or be sucked into the
housing by the fan and damage the fan or impair
cooling.
Warning and Safety instructions
19