Smeg SC110NE - Manual (Page 26)

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Instructions for the Installer
Use absorbent kitchen roll; remove stubborn dirt with a damp sponge and
ordinary detergent.
Warning: before removing the panes of glass, make sure that at least one
of the door's hinges has been locked in open position as described in
points “12.2 Removing the door”. This operation might have to be
repeated during the glass removal process if the door is accidentally freed.
12.4 Removing the gasket
To allow thorough cleaning of the oven, the door
gasket can be removed.