When cooking microwave popcorn, place the bag on a microwave safe plate. Extreme temperature differences, between the popcorn and glass tray, can cause thermal breakage of the tray.
(Added: 24-Jul-1999)

Keep the glass tray clear of food residue. While cooking, the spillage continues to heat and can cause thermal breakage of the tray.
(Added: 24-Jul-1999)

Keep vents on all sides and top of the unit clear. These are necessary for the cooling of internal components.
(Added: 24-Jul-1999)

Do not operate the oven without food inside. When there is no load to absorb the microwaves, they can be redirected back to the magnetron tube and cause premature falure.
(Added: 24-Jul-1999)

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