11-13-2007, 05:44 PM
Try this teeth whitening techinque for two weeks and you will see a difference. In the morning I brush my teeth and don't spit out the tooth paste. I hold it in my mouth for about 5 minutes while I shower. This "extra time" increases the whitening power of the tooth paste. In six weeks I have increased the whiteness of my teeth by two shades on the Crest scale.