1. Rub the apple cider vinegar straight onto your teeth to remove stains.
  2. Rinse with water.

The above process is great for stubborn stains, but can be abrasive on the enamel. Instead, try diluting a teaspoon of vinegar with a cub of water and use as a mouth wash.

The trick with using apple cider vinegar as a teeth whitener is consistency. You won't see results after just one go. You'll need to consistently use it everyday for at least a month. Like all good things, it takes time!