Clean em all, came from the school of cutting Krylon tips and gluing on whatever else I could to make the lines,flares I wanted.....when I see em in a yard....grabbed, Mine!
-Chuck em in a 1 gallon can of Acetone, let em sit, brush em clean, guitar wire for the tip and they're back to life. Stubborn ones get the graff remover treatment then back in Acetone.
-Been working on a boombox, super gluing the stock ones to it...take a few off everytime i do a new mop and use them for mixers
Oh and TCE...was developed as an anasthetic only to be used later as a degreaser.....so inhaled, you would fly...