Place a clean, dry cloth over the watermark and use a warm iron on low heat for a few seconds at a time
Rub the watermark gently with non-gel toothpaste and a soft cloth, then wipe clean
Mix baking soda with a small amount of water to form a paste, rub lightly, then wipe off
Apply mayonnaise or petroleum jelly to the mark, leave it for several hours or overnight, then wipe clean
Use a hair dryer on low heat, moving it constantly over the area until the moisture lifts
Lightly buff the spot with fine steel wool or a soft abrasive pad if the finish allows it
Apply a small amount of mineral spirits with a cloth to remove surface residue
Refinish the area with matching wood polish, wax, or stain if the mark remains
Sand the affected area lightly and refinish if the watermark has penetrated the wood
Test any method on a hidden area first before treating the visible surface