Apply water-displacing spray to the stain.
Cover it with plastic wrap. Allow it to sit for 5 to 10 minutes.
Mix warm water with a few drops of a mild, dish-washing liquid.
Saturate a sponge in the mixture. Rub the stain with the sponge until it is gone.
Rinse with a damp cloth.
Create a paste using small amounts of baking soda and non-gel toothpaste.
Apply the paste to the heat stain. Rub the paste gently into the oak table with a soft cloth until the paste warms.
Wipe off the paste with a clean, damp cloth.
Repeat the process until the heat stain is gone.
Polish the oak table as usual.
Preheat your iron on a medium setting.
Place a clean, white towel on top of the water stain.
Rub the iron over the towel in a back and forth motion for several passes.
Lift the towel to check the stain. Continue rubbing the iron across the towel until the stain has been removed.