We're glad you reached out about this and hope it helps to know that this tooth discoloration is actually a sign your mouthwash is working, and that the discoloration is reversible and preventable. Crest Pro-Health products contain active ingredients that are recognized as safe and effective, and are optimized to fight plaque and gingivitis. After they kill the germs in your mouth, the germs may collect on the tooth surface and create the appearance of a brown stain. To help aid in the removal of tooth surface stain, we recommend a tartar-control/whitening toothpaste, a power toothbrush, floss, and regular dental visits. When you have a minute, please reach out to us at (800) 285-9139 and let us know if any of the tips have helped

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're glad you reached out about this, and hope it helps to know, like all mouthwash products that effectively fight plaque and gingivitis, Crest Pro-Health products contain an active ingredient that is recognized as safe and effective. These anti-plaque/anti-gingivitis mouth rinses can contribute to temporary, surface-level brown tooth discoloration. This tooth discoloration is actually a sign your mouthwash is working. After it kills germs in your mouth, the dead germs can collect on the tooth surface and create the appearance of a brown stain. Brown discoloration is reversible and preventable. To help aid in the removal of tooth surface stain, we recommend a tartar-control/whitening toothpaste, a power toothbrush, floss, and regular dental visits. When you have a minute, please reach out to us at (800) 285-9139, so we can find a mouthwash that meets your needs.

We're sorry you're feeling disappointed. We do put a lot of thought into creating features that we think you'll like, though we do understand that preferences can vary from person to person. We'll be sure to share your feedback with our team. We'd also be happy to learn more about your experience, so please give us a call at (800) 285-9139 when you're able.

We're truly sorry to hear about your experience Melissa, especially after being a loyal user for years, and understand how upsetting your daughter's discomfort must be. At Crest, safety is paramount, and all our products are rigorously evaluated for safe use as directed. This is not the experience we want for our valued customers. Please contact us directly at (800) 492-7378 so we can learn more and assist you.