Miele KM 520 Operating And Installation Instructions page 23

Spots caused by limescale deposits,
water and aluminium residues (which
have a metalic appearance) can be
removed using the ceramic cleaner.
Cleaning and care
Should any sugar, plastic or
aluminium foil spill or fall on to a hot
cooking zone while it is in use, first
switch off the appliance. Then 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.
Allow the cooking zone to cool down,
and then clean as described above
with a suitable proprietary ceramic hob
cleaner.
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