I assume then, this knob controls the arm electronically. If it is a mechanical control a lubricant like WD40 might work better. Just a suggestion.
I can understand how you feel, I have 4 Denon TT, (2) DP-52F, a DP-59L, and a DP-61F, all are running Denon MC cartridges...I have been very happy with the Denon brand for many a year. My first table was a DP-52F (still have that table) that I bought in 1982...:celebrate008_2:
I assume then, this knob controls the arm electronically. If it is a mechanical control a lubricant like WD40 might work better. Just a suggestion.
I bought some deoxit and voila! Problem solved.