Urethane Supply 1001-4 Eco-Clean Plastic Cleaner (Zero VOC), quart trigger sprayer
Eco-Clean Plastic Cleaner is a water-based plastic cleaner with powerful surfactants that will remove mold-release agents, oil, grease, bumper sticker residue, tar, bugs... you name it. And, because it is zero VOC, it can even be used in California where they have Draconian rules on VOC emissions. It comes in a trigger sprayer bottle, so you won't have to worry about California's Draconian aerosol rules, either. Just spray it on in a heavy, wet coat. Wait a few seconds for it to emulsify the crud and wipe it off with a clean cloth in one direction.