Make a solution of water and baking soda. Put aluminum foil on the
bottom and cook your stuff in it.
Folks, the poster didn't ask how to turn her piece white again. The
question was about cleaning only inside bezels without cleaning the
rest of the piece! (By the way, this must just be done mechanicly,
with a small brush in the flexshaft or whatever will fit-- or better
yet, keep it clean in the first place).
Please please actually read a post if you decide to answer it-- is
that too much to ask?
Noel (feeling grumpy this morning, probably because of being tired
of being in pain from fibromyalgia and now planter faschiitis)