Parkinson Cowan SIG 504 - Manual (Page 14)

Condensation
Condensation may form on the appliance. 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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The oven