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Sheldon
 
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zxcvbob writes:
Oven cleaner (lye.) It work great on glass or stainless steel too;
don't use it on aluminum.

Oven cleaners are not just lye, nor are they designed to be used on any
bare metals including stainless steel... there are many hundreds of
stainless steel alloys, with those reserved for food use not being very
corrosion proof (I once permanently discolored a stainless steel pot by
boiling white vinegar). Oven cleaners are designed to be used on
porcelainized surfaces only (do not use on continuous clean ovens
either).

Oven cleaners may or may not work on corningware, I would suggest first
testing a small inconspicuous area... but actually I would never use or
recommend oven cleaners for any purpose other than as directed by the
manufacturer.

That said I've never found a situation where my patented ammonia method
would not safely/effortlessly remove burned on food from
glass/porcelain and ferrous metals (do not use on aluminum or copper).


If corningware were exposed to the temperatures approaching that of an
oven cleaning cycle I would suspect that permanent damage has occured,
in the form of crazing, then the piece is ruined and cannot be
cleaned... do not use if crazed... not only will the myriad minute
cracks/fissures harbor pathogens but exposure to extreme temperatures
(such as from cooking, freezing) can cause the piece to explode.

Sheldon