Peel off as much of the sticker as possible
Rub the residue with warm soapy water
Apply rubbing alcohol to a cloth and wipe the adhesive
Use white vinegar on the sticky area
Apply cooking oil, let it sit, then wipe away
Use baking soda mixed with a little oil to scrub gently
Warm the adhesive with a hair dryer, then peel or wipe it off
Use a plastic scraper or old credit card to lift residue
Clean the area with glass cleaner or adhesive remover
Wash the surface with soap and water after removing the adhesive