Bosch NIT8053UC Use And Care Manual page 9

Examples of possible damage The following types of damage have no effect on either the function or the integrity
of the ceramic glass top.
Pitting
caused by melted sugar or foods with a high sugar content.
Scratches
caused by grains of salt, or sand, or by the rough bottom of a pan.
Discoloration with a metallic sheen
caused by pan abrasion or an unsuitable cleaning agent.
Dulled markings
caused by an unsuitable cleaning agent.
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