This discussion about fretboard conditioning is humorous to me. I use the F1 about once a year or so to clean to them. Gunk always comes off when I do that. I don’t worry so much about them looking “moisturized.” When I got the ‘21 NR and took it to the ‘22 get together, I got comments about how dry the fb looked. I hadn’t cleaned it up before taking it. I play that bass a lot. And it, like all my basses, are never in their cases except when I transport them. I’m looking at it now as it’s hanging above the computer monitor where I work. It still looks dry. Even though I’ve cleaned it a couple times since that summer. I need to polish the frets; I probably haven’t ever done that to it before. I’ll likely give it a quick pass with my set of fret erasers tonight and do the F1 thing to arrest my OCD.