By following these simple steps, you should get years of worry-free brushing:
1 Rinse brush head and bristles after each use.
2 Clean the brush head at least once per week, including under the removable nut. To remove the nut:
Press down gently on the white area.
Avoid using sharp objects to push on the seal as this may cause damage.
Pull the nut up over the top of the brush head
To replace the nut, slip the nut over the brush head shaft and
pull until it clicks back on.