Miele H6500BM Operating And Installation Instructions page 16

Warning and Safety instructions
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Fire hazard. Using Microwave solo  or Microwave combination
programmes with plastic dishes which are not microwave safe can
cause them to melt and damage the appliance.
Do not use any containers or cutlery made from or containing metal,
aluminium foil, lead crystal glassware, temperature-sensitive
plastics, wooden utensils or cutlery, metal clips or plastic or paper
covered wire ties. Do not use bowls with milled rims, or plastic pots
with the foil lid only partially removed (see "Suitable containers for
microwave use").
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For functions without microwave power: plastic containers which
are not suitable for use in an oven can melt at high temperatures and
can even damage the oven or catch fire.
Only use containers which are declared by the manufacturer as
being suitable for use in an oven. Follow the manufacturer's
instructions on use.
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Do not leave the microwave oven unattended when reheating or
cooking food in disposable containers made of plastic, paper or
other inflammable materials.
Before using single-use containers make sure they are suitable for
use in microwave ovens. See "Suitable containers for microwave
use - Plastics".

Do not heat food up in the oven in heat-retaining bags which are
intended for use in normal ovens.
These heat-retaining bags usually contain a thin layer of aluminium
foil which reflects microwaves. This reflected energy can, in turn,
cause the outer paper covering to become so hot that it ignites.
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The oven can suffer damage when using Microwave solo  or
Combination programmes if it is empty or incorrectly loaded.
For this reason please do not use functions with microwave power
to pre-heat crockery or to dry herbs. Instead use Fan plus  or
Conventional heat .
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