Zanussi GC 21 M Instructions For The Use And Care page 16

In the case of persistent spots you may
use normal non-abrasive detergents,
currently available on the market, or
some hot vinegar.
Never use steel-wool pads, chlorine or
similar products which might scratch,
grind or etch the metal.
To clean the cover use liquid or creamy
detergents, thus avoiding the use of
powder abrasives, rough sponges or steel
wool.
Also, never close the cover while the
burners are still warm.
Replacing the oven lightbulb
Disconnect the appliance from the
electric supply.
Unscrew the lightbulb glass protection
from the oven. Unscrew the lightbulb
and replace it with a new bulb suitable
for high temperature (300°C) and having
the following technical features:
Operating voltage: 240V - 50Hz
Power absorbed: 15 W
14
Removing the oven door (Fig. 8)
To thoroughly clean the oven you should
remove the door by proceeding as
follows:
Open the door as far as it will go.
With the aid of a coin, turn the oven
door stops (catches) 45° to the right.
Slide off the door.
After having cleaned the door, lift up
hooks provided under the hinges and
reassemble the door carrying out above
operations in the reverse order.