how come when i play bass for a long time when i look at my hands they aquire some kind of black dirt on them , its not a calice cuz it washes right off. im sure everyone has experienced this, but how do you fix it
Change strings, that means they are dirty.
Wipe down your strings after you play and make sure you clean your hands BEFORE you play. Its skin and dirt from your strings.
I put a new set of ernie ball 'flats' on my p-bass this week they had a black coating on from new i cleaned them with wd/40 they are now clean+shinney................