also you can use some chapstick or some bow string wax on the nut this will help to keep the guitar in tune once the strings are fully stretched out and make sure the bridge tuners are not bottomed out.
Close... There's a school of thought that lubing the trem
knife edges where they touch the post will give you better return to pitch when you dive and pull back. This doesn't stop it from gradually going flat over time as the OP is describing, but is certainly not going to hurt anything. The nut, however, would do nothing - since you simply lock it down after you're in tune, there should be no problems with friction pushing the guitar out of tune. Or, to put it another way, since friction is what's holding the strings locked in place on the nut, then you want all the friction you can get there.
Also, while some people do recommend chap stick, technically chap stick is not intended to be a lubricant. I follow Kevan Geier's (of Tremol-no fame) school of thought, where really your best bet is some sort of a PTFE lube (it contains Teflon). The one I strongly recommend is Pedro's Extra Dry Chain Lube - it's a lubricant specifically designed to repeal dust and dirt, for mountain bike chains. I figure anything designed to be used in that much dust and mud can probably deal with a little bit of pick dust without too much problems - it stops gunky buildup, which rules.
Besides, it was the only PTFE lube I happened to have around. :lol:
@ Light - setting up a Floyd is certainly a bit of an art form and has a steep learning curve, but if you're patient and willing to spend an hour or two the first few times you do it, there's no reason that anyone with a couple allen wrenches, an understanding of how the trem works, and some time on their hands (and probably a beer or two) can't get a good setup on their own. There's certainly nothing wrong with just bringing it to a good tech, butonce you get the hang of it you'll save yourself a LOT of time and money by just doing it yourself.
Besides, in a twisted sort of way, it's kind of fun.
