Miele KM 2312 Operating And Installation Instructions page 14

Warning and Safety instructions

If the appliance has not been used for a long period of time it
should be thoroughly cleaned before it is used again. It is also
advisable to have the appliance tested by a qualified person for
safety.
Cleaning and care

Do not use a steam cleaning appliance to clean this appliance.
The steam could reach the electrical components and cause a short
circuit.
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