It could be that the cutting unit of your nose trimmer is blocked by dirt or debris. This can prevent the trimmer from switching on or running properly. Clean your device by following the instructions below.

1. Switch off your nose trimmer.
2. Rinse the trimming head of the nose trimmer with hot water.
3. Switch on the trimmer and rinse the trimming head once more to remove any remaining hair. Then switch off the appliance again.
4. If rinsing the trimming head under the tap is not sufficient, immerse the trimming head in a glass with warm water for a few minutes. Do not put the handle of the trimmer in the water, as this can damage its internal machinery.
5. Carefully shake off excess water and let the trimmer air dry. For best results, clean your Philips Nose Trimmer after each use and lubricate the trimming head with a drop of sewing machine oil every six months.

For detailed cleaning instructions referring to your particular model please refer to the user manual.

If you own a nose trimmer which runs on disposable AA batteries, it is possible that its time to replace these. To solve this issue simply replace the battery with a new one. When replacing the battery, make sure that the + and - poles of the battery point in the right direction. 
For rechargeable multigroomers check if your device is fully charged. While charging your groomer make sure you use the the original charger which comes with your device. For further charging instructions please refer to the user manual. 
If you have tried the advice above but your nose trimmer or groomer is still not working properly, please contact us for further help.