I looked and found this:
A late update: The only solution is to replace the oven bottom plate.
Both Sears and a different (not Sears) on-line appliance repair site
gave me that answer. Apparently, the solution Sears gave to
leandat31-ga (see below) is not correct (and I tried it also and it
had no effect). The good news is that the part is available from
Sears on line for about $22 plus shipping.
My conclusion - DO NOR USE REYNOLDS WRAP RELEASE NONSTICK ALUMINUM
FOIL. IT CAN DAMAGE YOUR OVEN PERMANENTLY.http://answers.google.com/answers/threadview/id/737196.html