Am I doing something wrong? I've completed 6 upper and 6 lower strips, i still have more to go, but why are only the tips and corners of each tooth getting bleached? I leave them on for full 30 mins
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The tips and corners of the teeth are notorious for having "hypocalcified" spots. These ares take up the bleach faster and look whiter very quickly. Keep bleaching so that you can bring up the background color. The tips and corners will blend better when you are done. Also, they get very white because of tooth dehydration, which bleaching causes. Once the teeth rehydrate, every thing will look more normal. No Worries!!
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