Hi! First of all, even though I had read through few threads in the forums about "cleaning your guitar", I still have problems removing, perfectly all the "dirty stuffs" that stick for too long on the fingerboard of my guitar and some of my friends guitar. I use some baby oils and a towel (yes, towels...) to wipe my guitar~~ the strings, the fingerboard, back of the neck, body, and the area around the saddles, almost everytime after I played it if I don't feel too lazy to do that. I don't really know how to find lemon oil around my place so I use baby oils everytime... About the "dirty stuffs", it's really really hard to just rub it off~~ it feels like it'll only goes off when I use something like my fingernails to scrape those things off AND in fear that if I continue to do so will result in damaging the fingerboard really hard in the end. Figured out that this is the best place to ask for advices about this and attached some crappy pictures that I took with my phone and hope you can see that there are some part of the fingerboard where it looks like there are some sticky stuffs on it (clearly in the first pic and last pic.....I guess). Please write your comment about this and thank you in advance!