Rubbing alcohol would do it on the sheetmetal, but not on plastic.

I checked a few YT vids which show how to remove it from paint which is simple, but even name brand products do not seem to work on plastic in those videos.. and most advice warns about damaging the finish with most household cleaners. Man, and we chew this stuff...!!! Never had such a problem in the past. Maybe it's the 'so-called plastic' which maybe isn't even plastic..? Strange.