Pioneer CDJ 2000 Jog Wheel makes noises and isn't smooth

[Soulfusion]

I have purchased a couple of used Pioneer CDJ-2000 from different sources, but in similar condition (very good, almost mint). I noticed one of the wheels sounds and feels rough. I took it apart and looked at it, everything looks clean. The springs are just right. What could be causing the wheel to make that bumpy and noisy sound? Thanks

[JackStalk]

They get worn over time, especially if the previous owner used them in vinyl mode a lot. I think there are some sort of rollers/bearings that they ride on and those moving parts wear. Thats the unfortunate drawback of purchasing used equipment

[Soulfusion]

Has anyone else experienced this and fixed it?

[JackStalk]

When youre actually DJing most of the time the music is loud enough where you dont hear it. I never audibly noticed it on my old mk1s

[efinque]

I remember some CDJ owners (mostly 200's) putting a piece of slipmat under the platter/jog wheel to make it smoother.