Is this 10 o'clock channel imbalance free from noise or crackling when you adjust the volume control into that position?
Dust or oxidation in a pot never causes a simple channel imbalance. It causes intermittent contact of the wiper to the resistive element, which causes noise, crackling, etc., but not a simple stable imbalance.
It's rare that pot problems are just dust you can blow out. Many pots, the good ones, are sealed. Pot problems most often can only be cleared with cleaning using the proper cleaning product, being careful to select one appropriate to conductive plastic, if that's the resistive element.
Without knowing more...a lot more... this is virtually impossible to diagnose. The OP didn't even say what the amps are.