<human>:  What is the best way to repair a broken electric toothbrush?
<bot>: The best way to repair a broken electric toothbrush is to take it apart and inspect the components for any signs of damage. If there is none, check the wiring to make sure nothing is disconnected. If the wiring appears okay, check the battery and charging port to ensure they are functional. If there are still no signs of trouble, try replacing the battery and charging port. If none of these solutions solve the problem, take the toothbrush to a repair shop for further diagnosis.