Someone forgot to use a coaster?
Grab any of these household products and you’ll be able to buff out those water rings, easy.
Get those white marks—caused by hot cups or sweating glasses—off your coffee table or other wooden furniture by making a paste of one tablespoon baking soda and one teaspoon water.
Gently rub the spot in a circular motion until it disappears.
Remember not to use too much water to remove water stains from wood.
Salt is also supposed to solve the water mark problem.