If you stick a label on something, taking it off and removing all residue can be difficult if you don't know how to break the adhesive down. While hot water and soap will remove most sticky labels, there is a technique you can use to break down heavier adhesives in labels that are more stubborn. Alcohol can be used to remove sticky labels in any form, but acetone is a particularly effective method for removal.
Soak a cotton ball with some acetone.
Rub the cotton ball around the perimeter of the sticky label, making sure to completely saturate it.
Stick the tip of a steak knife in between the label and the surface to separate them. Remove any pieces of the label that peel away.
Continue soaking the label with acetone soaked cotton balls until the entire thing has curled away and only the adhesive remnants remain.
Scrub at the adhesive remnants with another soaked cotton ball until it dissolves.
Wipe the area dry with a clean cotton ball.