Supposedly if you put graphite shavings in your nut groove it keeps better tuning, myth? if not how much? like light dusting or a lot?
Peavey 5150
Fender Showmaster QBT
Digitech Digidelay
I just use a pencil and run it down the slots. You preferably want enough to reduce as much friction as possible. So ya, a lot, but not a ridiculous amount.
Quote by Kensai
Racism... against the human race? Sure, go ahead
Yeah, i heard the same thing. Sometimes my G String makes a ping noise when I am tuning, andi have been told that graphite will help(hahaha not that G-String)
Not sure about actual "shavings," but like the guy above, just use a pencil. Make sure it's actual graphite though, some pencils can be made out of some weird stuff.

I would say a light dusting should be enough, at least it suffices for me. It works like a lubricant, so the strings don't "bind" at the nut.
~We Rock Out With Our Cocks Out!: UG Naked Club.~
Once in a blue moon, God reaches down from his lofty perch, points at an infant boy and proclaims, "This one shall have balls carved out of fucking granite."