Teeth whitening...?

I have a problem with teeth whitening. I brush my teeth three times a day (once after every meal) for ten minutes, very carefully. I floss once a day, adding another ten minutes to my brushing. I rinse my mouth with mouth wash (most of the time Listerine) twice a day (for thirty seconds). It's not that my teeth isn't clean. It just isn't ridiculously white. It's cleaner than a lot of people I know, but it still isn't "business" white or as white as a few people. What am I doing wrong?
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Brushing your teeth like that will not always keep the bright and white. Ten minutes per brushing is VERY excessive - three at the most. How are your gums doing with all that brushing? If you want to try whitening your teeth while brushing, use pure baking soda. Put a bit of water on it and brush away. I use to do that in my 20's and got compliments ALL the time about how white my teeth were - and I SMOKED back then! It works - just use it consistently.
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