Our products go through many quality checks to make sure you receive the amount listed on the label, so we're certainly sorry to hear about your recent purchase. In order to learn more about your experience to share with our Quality Team, and to help further, please give us a call at (800) 395-8423.

We're very sorry to hear that the spaces between your teeth did not get as white as the rest of the tooth surfaces after using Crest 3D Whitestrips. We can understand your disappointment, and this is certainly not the results we want you to have. Consumer testing and clinical studies have shown that Whitestrips are effective. However, if you have stubborn stains you may need to use a second box of Whitestrips to achieve the results you want. Our Crest Team would like to talk with you more about your experience, and ask that you please give us a call at 1-800-395-8423 from 9AM -- 6PM EST Monday – Friday. We'll be happy to further assist you.

We're sorry to hear this. We want these kits to give you an incredible whitening experience, which we stand behind with our Crest Whitening Guarantee. So we can share some further information with you regarding this guarantee, we ask that you give us a call at (800) 492-7378.