To fix the problem of LED ghosting, several steps can be taken: First, ensuring that the wiring is correctly installed and grounded can help eliminate any potential electrical leakage. Second, replacing old or faulty dimmer switches with compatible units that are designed to work with LED lights can help reduce ghosting. Lastly, using LED drivers that are specifically designed for the type of LED lights being used can also help prevent ghosting. By following these steps, it is possible to stop LED lights from glowing when they are switched off.