Once the sticker has been saturated with the product, allowing it to soak for 1 minute, wipe the surface with a dry microfiber cloth to remove sticker residue. Spray the sticker and the surrounding area with a tar removal substance. Be liberal with the application. This will help to break down the glue on the back of. How to remove stickers from car with solvents · Boiling water: Soak a cloth in boiling water and (carefully!) apply it to the sticker, or pour the water directly.