I'm currently using Crest Whitestrips Advanced Seal and am about 3 days into it. You are supposed to use them once a day for 14 days, 30 minutes a day. I was just wondering if I could use one in the morning and one in the evening/night to help speed up the results. So far I haven't had any of the sensitivity that the box said might happen.
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It's not too bad, you just have a higher chance of getting very sensitive teeth. I'm sure it'll be fine.
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