Philips HX 7351 - Manual (Page 10)

1 To switch from normal to reduced speed, press the Dual Speed
Control button once during brushing.
To switch from reduced to normal speed, press the Dual Speed
Control button a second time during brushing.
A distinctive two-tone beep indicates that the speed setting has been
changed.
We advise you to brush at the normal speed setting to maintain optimal
results.
Make sure you select the normal speed setting when the Sonicare is
used in clinical trials.
Cleaning
Regular cleaning guarantees the best performance and a long life for the
appliance.
1 Rinse the brush head and bristles after each use. Let the brush head
air-dry only.
Clean the brush head at least once a week, including under the nut.
3 To remove the nut, gently press on the rubber seal with your thumbs.
Do not use sharp objects to press on the seal, as this may cause damage.
Pull the nut over the top of the brush head.
4 To reattach the nut, slip the nut over the brush head shaft and pull it
down until it snaps home.
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