Be careful brushing with baking soda - it is very abrasive.

Usually I put some hydrogen peroxide and baking soda in my water pik (twice a week) to help my overall oral dental care.

I recently decided not to have my teeth whitened because it is very expensive to have a dentist do it and it only lasts about 3 months per "zap". Also, I've heard some horror stories about how sensitive it makes your teeth.