Zanussi ZCG 7700X Operating Instructions Manual page 13

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Condensation
Condensation may form on the cooker. This is quite normal and nothing
to worry about. The condensation forms when heat and moisture are
present, for example during cooking. Whenever possible try to make
sure that food which contains a lot of moisture, for example casseroles,
are covered. If you do notice any condensation, wipe it up straight away.
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