ANSWERS: 2
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if you smoke or drink coffee, they will stain regardless...
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For one thing, stop using whitening products!!! It wears down your enamel, and when that happens your teeth STAIN easier. You're better to use a basic toothpaste and eat and drink things with a lot of calcium to strengthen your teeth. Also rinse with a mouthwash that has Flouride to strengthen your teeth and fight tarter, plaque and cavities.
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