Matrix MR311SS Manual For Installation, Use And Maintenance page 17

Over time with use, the stainless steel surface may discolour;
this is normal and does not constitute a fault with this appliance.
Proprietary stainless steel cleaners are available.
Cleaning the oven interior
To clean the oven interior, suitable proprietary
chemical cleaners may be used after
first consulting with the manufacturer's
recommendations and testing a small sample
on the oven cavity.
Do not use metal scrapers or harsh cleaners on the oven door
glass. These could cause scratches, which may result in the glass
shattering.
To remove the side racks, press down on the
top bar of the side rack to free the rack from the
top securing pin, then remove the side rack by
lowering it out so that the hooks on the lower edge are freed from the
oven cavity (as shown in fig. 9 and 10).
To replace the side racks, locate the lower
hooks in the oven cavity, then pivot the side rack
back into position, pressing the top bar down to
relocate it against the securing pin.
Ensure that all parts are correctly replaced after cleaning before
attempting to use the cooker, and that the rubber pads are in place
on the base of the pan stands before repositioning the pan stands
on the hob top. To replace the hob burner parts correctly, refer to fig.
1 on page 7.
Fig.8
Fig.9
Fig.10
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