the volume level in one of my decks keeps going up even though its totally down on my controller

Easy

what can i do to sort out this problem?

Stevan

It seems like the best solution for the issue you are facing is to replace the fader. While cleaning it may provide a temporary fix, it is not a long-term solution.

In the meantime, you can remap the volume to another fader-based hardware control as a workaround until the fader is replaced.