Appliance Repair Questions? Ask a Technician for Answers ASAP
Turn the burner on to the low setting, and when the plastic residue has warmed up, scrape it off gently with a putty knife. When most of the plastic is removed, turn the burner off, and let it cool. Scrape the rest of the plastic off, and clean any remaining residue with laquer thinner. Make sure to have adequate ventilation when using the laquer thinner, and no other heat sources on.
If my answer helps you, please click on the 'accept' button. That's how we experts are paid for our efforts.