Wipe up fresh spills immediately. Use a clean cloth and warm water. Allowing the spill to sit causes it to penetrate the wood.
Heat the area. Put a soft cloth or towel over the area of the spill. Set an iron to the dry setting at low or medium heat. Press the iron over the cloth or towel for several seconds. Make sure the iron does not touch the wood finish or it may burn it.
Apply a mix of white toothpaste and baking soda. Mix both together in equal amounts to form a paste. Rub the paste on any water stains for 20 minutes. Wipe the surface afterward with a clean soft cloth.
Mix mayonnaise and cigarette ashes together. Apply the mixture to the water stain and allow it to sit overnight. Rub the paste into the stain for 20 minutes. Wipe the surface with a clean soft cloth.