How To Use Oral-B iO Ultimate Clean Replacement Brush Heads BLACK:
1. Remove the old brush head from your Oral-B iO electric toothbrush by pulling it straight off.
2. Align the new replacement brush head with the metal shaft on the toothbrush handle and push it on until it clicks into place.
3. Turn on your electric toothbrush and start brushing as you normally would, allowing the advanced bristle technology to provide a thorough and gentle clean.
4. Pay attention to the indicator bristles, which will fade to let you know when it's time to replace the brush head.
5. After use, rinse the brush head thoroughly and store it in a clean, dry area for the next use.