Scrape as much of the adhesive off the wood as possible using your fingernail or the dull edge of a butter knife. Be careful not to press too hard, which may damage the wood.
Use a hair dryer to blow hot air onto the remaining adhesive for three to five minutes. The heat will soften the adhesive and make it easier to remove. As the adhesive softens, wipe it with a clean cloth to remove it from the wood.
Saturate a small sponge with undiluted white vinegar if the blow dryer method did not remove all of the adhesive. Place the wet sponge on top of the affected area and allow it to sit for five minutes, so the vinegar can penetrate the adhesive. Remove the sponge, then wipe the adhesive off with a clean cloth.