Bumper stickers can leave behind adhesive residue when peeled from a car. The sun's rays bake the adhesive into a car's bumper, adding to the difficulty in removing the residue. Using soap and water alone does little to budge the adhesive from the car because it does not have the capability to dissolve the glue. You must weaken the glue so it will release its grip on the car.
Hold a blow dryer 2 to 3 inches from the sticker adhesive. Blow hot air on the adhesive for one minute.
Scrape the adhesive with a damp nylon brush. Continue blowing heat onto the glue as you scrape. Use medium pressure as you scrape the adhesive.
Wipe the loosened adhesive from the car with a damp sponge. Dry the area with a soft cloth. If adhesive remains, continue heating with the blow dryer and scraping, removing all the glue from the car.
Fill a bucket halfway with warm water and 1/2 tsp. of liquid dish soap. Wash the affected area of the car with the soapy water and a sponge.
Rinse the area with cool water and dry with a soft cloth.
Pour 3 tbsp. of mineral spirits on a soft cloth.
Saturate the sticker adhesive with the mineral spirits. Allow the lubricant to soften the glue for 15 minutes.
Rub the glue vigorously with a damp cloth, dislodging it from the car's surface.
Wipe the area with a clean, damp cloth. Wash the area with soapy water and rinse with cool water. Dry the car with a soft cloth.
