Sounds random, but it actually works. Take half a teaspoon of baking soda and mix it with a teaspoon of lemon. Dip your toothbrush in it and brush the surface of your teeth for a minute or two. This may hurt your gums at first but it’s a natural way to help get whiter teeth. Note: This can be abrasive, so only do this every once in awhile. Do it too often and you can brush away your enamel.
- Rated #9 in 15 Best Ways to Whiten Teeth at Home (Naturally)