....Maybe if I work at it enough with the rough end of a sponge, it'll break up.

[He sighs.]

I'll look up how to clean a burned stove.

[He pulls out his phone and starts googling.]

It says...really hot water and degreaser.

[He looks over at the dishsoap that he also bought from the 100yen store.]

That's supposed to remove grease. Maybe that will work.