My son has an Epiphone Casino which has been his main gigging guitar for about ten years. It has seen some wild gigs and much spillage of K cider and, in a related incident, a broken and repaired headstock. Son was staying with us for a few days before going off to play at Boomtown so, noticing the bedraggled state of the Casino, I offered to clean it and set it up. There was some resistance to this offer due to a fear of a loss of mojo.
Anyway, a couple of hours later, some cleaning and polishing fluids and some lemon oil, several cloths, some graphite bridge saddles, re-attached pickguard, fixed straplocks, a new set of strings, and set the intonation ... and it seems that under the dirt was where we found the real mojo which could now show through in all its clean glory.
Do you like dirty mojo or clean mojo?