If the device is not plugged in or fully charged it will not work properly. Plug the device into the wall and try to turn it on. Check to make sure charger light is on as an indication that the charger is in working order. Note that the trimmer will not run if it has not charged for at least ten minutes. For more information visit Philips Norelco MultiGroom 3100 Troubleshooting Page.
The easiest way to clean the trimmer would be to rinse it under a faucet. The trimmer is water resistant, so it won't be damaged by water. For more information, visit the Philips Norelco MultiGroom 3100 Troubleshooting Page.