Measure 1/4 cup of baking soda and pour it into the bowl.
Measure 1/4 cup of non-gel white toothpaste and pour it into the bowl.
Mix the ingredients together well using a large spoon.
Dampen a clean, white cloth with water and dip it into the mixture, which should be a paste by now.
Gently buff the heat marks or water rings in a circular motion with the cloth for one to two minutes. The marks should disappear; use a damp cloth to wipe the excess paste off furniture.