Baking soda really whiten teeth??

I am tired of expensive teeth whitening products that barely work. I heard someone say that they used baking soda and water, made them into a paste, and let it soak on there teeth for a couple of minutes every day and it made them whiter. Im just wondering if anyone has tried this and what kind of results they got.... show more I am tired of expensive teeth whitening products that barely work. I heard someone say that they used baking soda and water, made them into a paste, and let it soak on there teeth for a couple of minutes every day and it made them whiter. Im just wondering if anyone has tried this and what kind of results they got.
Thanks!!
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