I brush my teeth atleast two times a day. In the morning and at night. Each time, for a good ~2-3 minutes, and sometimes 5 . I brush in circles with enough toothpaste. For some reason, after all of this, my teeth are still yellow. From far away (like 5 ft) they look white, but when I actually look at them in the mirror they're a horrible yellow. What can I do to change this? Is there anything? Do any of those Crest whitestrip things work?
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