I’d open some windows turn on a fan and get some ventilation going, then turn on the stove and heat the plastic up, while constantly wiping with paper towels, or something else that’s sturdy that you don’t mind throwing away. The plastic will become malleable and should wipe off pretty easily. There may be a little residue left after this. You might just have to burn it off! If this is the case, consider removing the affected piece and putting it over a fire or grill outdoors so the burning plastic doesn’t stink up your home.