Some people think that
ovens can be "self-cleaning".
I beg to differ.
Ovens
require the
user to
lock the
oven door closed,
twist knobs or
push buttons, wait, and then
wipe out the
charred
results.
No, the real example of "self-cleaning" can be seen in the noble domestic cat. A cat will clean itself from top to bottom with its tongue and paws, finishing tidy and free from squallor.