A great solo by Jimmy, and he looks like he's trying to eat his face, but I remember seeing it for the first time and being amazed by the amount of gunk on his fingerboard (in all fairness, I tend to be a little OCD when playing - I wash my hands on every set break and wipe down my strings often). Am I incorrect in remembering that he once claimed that he preferred his strings and fingerboard to have gunk on them?
I recall that somewhere on the Standing in the Shadows of Motown DVD, Jamie Jamerson's son says something about his father never cleaned the strings of his DB ( which JJ Jr plays and hasn't changed the strings since the '60's!) because it would "take the funk out of the strings."
I remember a music store in Boulder where Steve Stills would come and ask for the old used dead strings. If he was forced to deal with "fresh" he would use BBQ sauce to get his strings to have the desired tone.
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"Tellin' you all the Zombie truth, here I'm is ....."
Usually five string with or without frets.
Why clean your strings? 
