Gorgomyte is apparently a very effective fret and fretboard cleaner. It was developed by a guitar tech named Jimmy Johnson and a chemist friend of his. Gorgomyte is endorsed and used by countless top pro players, is environmentally safe and very effective for polishing your guitars frets as well as conditioning the fingerboard.
I have not tried this yet but will give it a go in the near future. I will post back with my results. I am wondering if anyone else has tried it and can let me know here in the comments section how it works.