Mostly just damp cloth. If it's really sticky I use some regular soap. I see absolutely no reason why I should buy some of that overpriced bogus merchandising stuff. I never had a problem cleaning any of my guitars that way and none of them has suffered yet.

Most luthiers (the people who build and repair guitars) will tell you that the best cleaner is simply a soft, damp—wrung out, not dripping wet—cotton cloth, such as an old tee shirt. Use it to wipe skin oil, grime, and smudges from your guitar and then use a soft, dry cloth to absorb excess moisture and buff.

Gibson instruments are finished with several coats of a high-quality nitro-cellulose lacquer. This finish is hand-buffed to a high-gloss, mirror-like surface.