Larry Jaques fired this volley in
:

What's the best cleaner for baked-on crap on a toaster oven aluminum
pan? The perimeter of...er, someone's, is just black with it.

Oven cleaner contains lye and is contraindicated.

The first thing I'd do with it is simply boil it for a time. It's amazing
what hot water can jar loose, given time.

LLoyd