Miele CS1122E Operating And Installation Instructions page 16

Selecting cookware
Copper bottom and aluminum pans
may leave a residue on the combiset in
the form of metallic lines. This is normal.
These lines can be removed using a
non-abrasive ceramic combiset cleaner
or a shielded scraper blade.
Be sure to clean the combiset after
each use. Each time this residue is
allowed to melt it becomes harder to
remove and may mar the
appearance of the combiset.
Let the combiset cool before
cleaning.
Cast iron, glass or stoneware should
not be used because they have poor
heat transfer and may scratch the
combiset surface.
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