How to clean molten plastic from a pizza stone? I have a pizza stone, which has molten plastic on it (it touched the edge of a plastic chopping board briefly, while hot). I cleaned as best as I could with water, but when I put it in the oven it fumes very strongly.

My idea was to try to burn the plastic off in the oven, but oven doesn't appear to have the pyrolyze function or programme. 

Should I try and pyrolyze the stone in the oven anyway, even though my oven doesn't have a specific pyrolyze function? Is it safe?

What program should I set and for how long?

This is my stove: https://manualscollection.com/?fid=9dc6ab1d73e58b75a2c28e6625e3b9db&amp;read=online&amp;page=28
For anyone interested: I ended up scraping the stone with a butter knife and some steel wool, removing all visible plastic, after which I put it in the oven and heated it up to about 275°C. After about an hour it stopped fuming, and from what I can tell there was not much left on it, although it was still kind of black, but not as black as it was when I put it in the oven.

There were no problems with the oven, as for the plastic, I am still not sure if there isn't some plastic in the pores of the stone, but since it is not fuming I guess that most of it is gone. I will use the bottom side of the stone in the future and hope not to poison myself with plastic.