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Kitchen cooker changes colour

An ordinary electric black kitchen cooker which when the grill is turned off, a dull thud is heard which is an electrical short. I believe that at this point a negative charged gas is produced which rises up through the ventilation holes of the fan-assisted oven. The gas then attaches to the black oven top and leaves a chalky white finish which cannot be cleaned off. After a few days it has disappeared (oxidation). Does anybody have any ideas as to what is occurring.

Roger Whitehead
interested granddad - Manchester, England
March 10, 2010

No, Roger, not from so far :-)

Sorry, you lost me from the first sentence, but you could try again :-)

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
March 10, 2010

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