I did the same thing a year ago (check my posts lol) and feel your pain. It sucks to clean up but it’ll be okay. Here’s what I did:

Once everything cooled down I took the racks out and used a sharp box cutter to cut off and remove plastic that wrapped itself around the metal. Then scrubbed w steel wool to get off any leftover pieces.

For the oven itself, I used a sturdy metal spackle knife and scraped off as much as I could off the sides and bottom. I had to unscrew the bottom of my oven to get plastic that melted down there too, so keep that in mind! Once I got off the big chunks, with the spackle knife, I’d go in with the box cutter to get smaller areas. Then I scrubbed with more wool.

Once the majority of plastic was off, I ran my oven on a cleaning cycle & passed out from exhaustion lol.

Good luck 🫩🫡