When you buy a brand new guitar right off the showroom floor it’s shiny, clean and beautiful. The frets are perfect, there’s no dust. But as you play the guitar it gradually becomes dirty.
I found a kit that helps you to retain that shine on the fret and luster on the fingerboard. It is the GHS Fingerboard Care Kit. It’s a nice, convenient tube that has a fret buffer, some fingerboard mineral oil and a polishing cloth to use on the fingerboard.