We're sorry to hear that you haven't seen the brilliant results you expected. All of our products go through many quality checks to make sure you get results when used as directed. Please give us a call at (800) 448-6200 so that we can make this up to you.

We're sorry to hear that this has been your experience, and we hope you're feeling better. Safety is at the heart of all we do here at Crest, and we can assure you that our Whitestrips have been thoroughly evaluated to be safe when used as directed. The whitening ingredient peroxide - the same enamel safe whitening ingredient dentists use for tooth whitening - is at a level that's in line with regulations. However, some users may be more prone to sensitivity than others. There are steps you can take to reduce/eliminate this sensitivity, such as not brushing too hard, or more than twice a day during treatment, and using a softer toothbrush. As well, our Whitestrips go through many quality checks to ensure that you can enjoy brilliant results with them. 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. We'd also like to mention that you shouldn't exceed a total of 2 kits per year. We hope this is helpful, and we'd like to gather some more details for our Safety and Quality Teams. When you have a moment, please give us a call at (800) 395-8423.

We always want to leave your smile looking healthier and brighter, so we're sorry to hear about this! We do want to share that every Crest 3D White Whitestrips teeth whitening system is guaranteed to whiten teeth by removing surface stains, as well as set-in stains deep within the enamel. To take your brightening results even further, we recommend our 3D White Whitestrips with Light. If you'd like similar results in non-light form, our Supreme Flexfit Whitestrips are the ones for you. For any further questions, comments, or concerns, don't hesitate to give us a call at (800) 395-8423.

Sorry you're disappointed with the whitening results of the new Crest 3D Professional Whitestrips. These strips have been shown to be effective in both consumer and clinical studies; however, if you have stubborn stains, it may be necessary to use a second box of Crest Whitestrips to achieve your desired whitening results. Still, we'd like to help so please give us a call at (800) 395-8423. Thanks!