Miele DO 7860 Operating And Installation Instructions page 15

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Heat-retaining bags usually contain a thin layer of aluminium foil
that reflects electro-magnetic waves. Because of this, the paper
surrounding the aluminium foil can become so hot that it combusts.
Do not use heat-retaining packaging, such as bags for grilled
chicken, for warming food with M Chef functions.
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Heating up food in closed containers results in an increase in
pressure which can cause them to explode.
Do not use tins for preserving or heating food.
Never use M Chef functions for bottling. Instead, use the Fan
Plus  or Conventional Heat  function and always ensure this
type of procedure is supervised.
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Risk of injury from the open door. You could bang into the open
door or trip over it. Avoid leaving the door open unnecessarily.
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The door can support a maximum load of 15 kg. Do not lean or sit
on an open door, or place heavy items on it. Make sure that nothing
gets trapped between the door and the oven compartment. Doing so
could damage the Dialog oven.
The following applies for stainless steel surfaces:
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The coated stainless steel surface can be damaged by adhesives
and will lose its dirt-repelling properties. Do not use sticky notes,
adhesive tape or other types of adhesive on the stainless steel
surface.
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Magnets can cause scratches. Do not use the stainless steel
surface as a magnetic notice board.
Warning and safety instructions
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