Interrupt the application to clean the head according to the user manual, as hairs might have got stuck in the head or its surrounding.
Check if the charging pins are soiled (e.g. shower gel, shaving foam or dirt has accumulated around the charging pins), the charging capacity might be reduced.
Optimize the lifetime of the rechargeable battery:
- Fully charge the device and let it run dry. Repeat this 2 to 3 times.
- Let the device run dry at least twice a year and fully charge it afterwards.
When the appliance still does not work very well, take it to your dealer or the nearest Philips Service Center.