Thanks for your review. If there's anything we can do to help you with your Crest Pro Health Advantage Multi-Protection Smooth Mint flavored mouthwash, please call. We're available Mondays through Fridays, from 9 AM to 6 PM EST. Our number is 1 (800) 492-7378.

We understand how upsetting it is to find your teeth have become stained and that your mouth was left feeling dry, and we appreciate your taking the time to bring this to our attention. We’re sharing your experience with our Health and Safety Team. Please know our products are thoroughly evaluated to ensure they’re safe to use as directed, and based on your experience, we recommend you discontinue using this mouthwash. Certain versions of Crest Pro-Health Rinse contain cetylpyridinium chloride (CPC), an ingredient that not only helps to fight plaque and gingivitis, but also kills bacteria in the mouth. For a small percentage of people who use the product, after it kills germs in your mouth, those dead germs can collect on the tooth surface and create the appearance of brown stains. This is more likely to happen in hard-to-brush areas. We want to assure you the discoloration is reversible and largely preventable. To help remove and prevent the discoloration, we recommend tartar-control/whitening toothpaste, a power toothbrush, and flossing. Any remaining stains can be removed with dental cleaning. So that we can help you further and learn more about your experience, please give us a call at (800) 285-9139.