Peel off as much of the sticker as possible by hand
Rub the residue with warm, soapy water
Use a plastic scraper, old credit card, or fingernail to lift residue
Apply a small amount of rubbing alcohol to a cloth and wipe the area
Use white vinegar on a cloth to loosen sticky residue
Apply cooking oil, baby oil, or mineral oil, then wipe clean
Use baking soda mixed with a little oil to gently scrub residue
Try adhesive remover on a cloth if safe for the surface
Heat the residue with a hair dryer and wipe it away
Wash the area with soap and water after removing the residue
Test any cleaner on a small hidden spot first