Question: how to whiten your teeth with apple cider vinegar and baking soda?
Answer: Mix equal amounts of baking soda and vinegar. For instance, mix a ½ teaspoon of baking soda with a ½ teaspoon of apple cider vinegar. Form a paste and brush your teeth with it before bedtime. Use it once a day for the next 15 days, and don't over use it as it might damage your teeth.