I have two teeth whitening questions: 1) Is it okay to use Crest Vivid White night during the day? Also will using it both in the day and at night whiten my teeth better, rather than using Crest Vivid white in the day, Crest vivid white night in the night? 2) Will swishing salt and water in my mouth whiten my teeth? 3) How long does it take Crest Vivid white products to get white teeth? I havnt seen a differrence and its been 2 weeks and Ive tried everything I can.
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don't use it to much, and salt and water is not going to do anything
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