How much do you have to brush your teeth with baking soda until you see a difference?

STEP 1. Make sure toothbrush is wet and all the bristles are covered in baking soda.

STEP 2. Brush your teeth twice a day.(burning and tingling is perfectly normal).

Your teeth should be white in about a week (mix baking soda w/ toothpaste to get rid of salty taste).