I used the "Control Cleaner/Lubricant" that Radio Shack has (which I think is the same thing as their TV Tuner cleaner, as it says on the can that it's especially good for TV tuners), but I'm still getting a clicking. Also, I couldn't see where to clean the pots, although they don't really need it. Mine don't seem to have an opening (and my input jack isn't in a steel can, either). Maybe yours is better shielded than mine or something. The clicking is most noticeable when there just a little bit of ringing from the strings coming through, but not when I'm playing loudly or not at all.