Miele DO 7860 Operating And Installation Instructions page 11

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Grilling food for excessively long cooking durations can cause it to
dry out with the risk of catching fire. Do not exceed the
recommended cooking durations.
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Please be aware that durations when using an M Chef function are
often considerably shorter when cooking, reheating and defrosting
than when using a conventional function. Excessively long cooking
times can lead to food drying out and burning, or could even cause it
to catch fire.
Never use an M Chef function or a Grill function to dry flowers or
herbs. Instead, use the Fan plus  or Conventional heat 
function.
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If using alcohol in your recipes, please be aware that high
temperatures can cause the alcohol to evaporate. The vapour can
catch fire on hot heating elements.
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When using residual heat to keep food warm, corrosion from high
air humidity and condensation can occur in the Dialog oven. This
can also cause damage to the control panel, worktop and
surrounding kitchen furniture. Keep the Dialog oven on and select
the lowest temperature available for the selected function. The
cooling fan will then continue to run automatically.
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Food which is stored in the oven compartment or left in it to be
kept warm can dry out and the moisture released can lead to
corrosion damage in the Dialog oven. Always cover food that is left
in the oven to keep warm.
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An accumulation of heat can cause the enamel on the floor of the
oven to crack or flake off.
Never line the floor of the oven compartment with aluminium foil or
oven liners.
If you wish to place crockery on the floor of the oven compartment
during cooking, or place crockery on the floor of the oven
compartment to heat it up, you can do so, but only with the Fan
plus  function, without the Rapid heat-up function.
Warning and safety instructions
11