How do i fix my odometer that is fading in and out?

What kind of fading? Is the light going on and off or is the Odometer actually not working sometimes. I would recommend buying a new cluster if it is actually fading away. If the light is going out then you can buy a 2721 bulb at a store and follow these steps. https://www.youtube.com/watch?v=qBAtNNCC1hw