Don, we're sorry to hear the instruction manual is too small to read, and would be happy to help you further. We do offer an online version, which you can zoom in on, if you'd prefer. So that we can help you with this, and any other questions you may have, please give us a call at (800) 566-7252.

Jennifer, we're sorry to hear it wasn't an easy transition to begin using your iO 5 toothbrush, and would like to help. Please know, our products are thoroughly evaluated to ensure they reach you in top condition, and feedback like yours is appreciated. So that we can learn more about your experience, please give us a call at (800) 566-7252.

We appreciate your taking the time to let us know this toothbrush feels slippery when brushing. We have many quality checks in place to help ensure only the best products reach you, and feedback like yours helps us improve our products. So that we can learn more, please give us a call at (800) 566-7252.

Hi Brian. We'd love to help you get the most from your Oral-B iO Series 5 toothbrush, or even help you find a brush that meets your needs the best! If you'd like to discuss our selection of Oral-B Rechargeable brushes, we'd be happy to help further. Just call us at (800) 566-7252 between the hours of 9am EST and 6pm EST. We look forward to hearing from you!