To clean the detachable nozzle, press the nozzle release button to remove the detachable nozzle from the appliance.
The nozzle can be cleaned in warm water with some washing-up liquid. The nozzle and other accessories are not dishwasher-proof. Make sure the nozzle is dry before you reattach it to the appliance. Also check the other accessories that come with the vacuum cleaner and make sure they are not clogged.
If the above solution(s) did not help to solve your problem, please contact Philips Consumer Care. You can find the phone number of the Philips Consumer Care Centre in your country under 'Contact' or 'Customer Service' on the 'Support' page of this site.