If you have a stubborn bumper sticker you’re struggling to remove from your car without leaving a residue, a chemical product is the best option: there are a number of sticker-removing solvents on the market (such as Goo Gone), with some brands offering a specific automotive option made to avoid damaging the paintwork. Applying heat with a hairdryer during the process also helps loosen up any residue. Any tips or tricks that have worked for you?