Miele H 4540 Pyrolytic Operating Instructions Manual page 59

Most residues are easily wiped away with a damp cloth.
Depending on soiling levels in the oven there may be visible
deposits on the door and below the trim under the oven
cavity. This is best removed using a non-abrasive sponge or
non-abrasive spiral pad and a mild solution of warm water
and washing-up liquid.
Deposits on the internal door panel can be removed using a
suitable glass scraper.
Spilt fruit juices may cause lasting discolouration to the
surfaces. This discolouration is permanent but will not
affect the efficiency of the enamel. Do not attempt to
remove these marks.
The pyrolytic process will be interrupted,
– if the soiling levels in the oven are too much for the
programme to deal with.
The message "Fault - 23" will appear in the display.
Remove all coarse soiling before starting the pyrolytic
process again.
– if the oven is switched off.
– in the event of a power cut.
Switch the appliance off. If the oven interior temperature is
below 280 °C, the door lock will be released after a period
of approx. 30 s. It can then be opened.
Start the pyrolytic cleaning process again if necessary.
Cleaning and care
59