This is how to conduct this method:
Swish a teaspoon of coconut oil in the mouth for 15-20 minutes, but ensure that it covers all the areas of the oral cavity. Do not gargle it, but spit it out to remove the bacteria it has absorbed from the gums and teeth.
Rinse with lukewarm water, and brush the teeth. Repeat this on a daily basis, and in several days, you will start noticing that your teeth gradually whiten.
You can also add some coconut oil to a toothbrush or a clean cloth, and rub gently. Very soon, everyone will give you compliments for your pearly whites!
Source: healthytofit.org