We’re sorry to hear you’ve noticed a residue building up on your toothbrush. We have many quality checks in place to ensure only the best products reach you. Please know we understand this is unsightly but it is likely a buildup from regular use. Even if rinsed after each use, residual toothpaste can harden over time and form a residue on your toothbrush and the replacement head. This buildup may be colored depending on your toothpaste and water hardness. In either case, this substance is not harmful and can be removed with a thorough cleaning. So that we can help you further, please give us a call at (800) 566-7252.

While we're glad our Oral-B App and iO Series 9 is helping improve your oral health, we're sorry that you're having issues with it tracking your brushing habits. Your feedback is important, and since we do many tests to ensure the app runs as smoothly as possible, we'd like to make a detailed report our team and figure out what's going on. Please call us at (800) 566-7252.

We know how important it is to maintain a healthy smile, so we're sorry to hear about your Oral-B iO Series 9. We'd love for you to brush alongside your wife with this brush, so we'd love to hear from you about this, and learn more about what's going on with your toothbrush. At your leisure, please give us a call at (800) 566-7252.