I recently acquired a Gibson electric with an ebony board. It's all good, except for one thing: Above and below most every fret there is glue residue, presumably slop from seating the frets. I don't know much about using glue to help seat fretwork, but I thought that builders who go with that method used real thin Krazy-glue type stuff. I doubt what I'm seeing is that sort of adhesive. It's more like Titebond or hide glue, as it's got a yellow cast and is slightly viscous and tacky. It's definitely causing friction as I play lines or slide my fingers on the strings. It's also gunking up my fingers and strings, particularly once I have a little hand perspiration going and the neck and board are warmed with my body heat. What's the best way to remove this residue from along the frets? Naptha? Steel wool? Micromesh? Something else? Thanks in advance.