I've been using it (irregularly) for about three weeks. I use it 1-2 times a day after brushing my teeth, wet the brush and brush my teeth for 2 minutes, leave on for 3 minutes and then rinse. I'm already starting to see results. I drink a lot of coffee and tea and I know this is not a permanent bleach. But it does a good job, my friends comment my teeth look whiter.
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