I've had my Ibanez S520EX for slightly over a year now and the only thing I've done to it in maintanance other than polish and clean was installing Dimarzio pickups. I was reading that its best to also lubricate the ZR tremolo but my question is how do you do this (where do you apply it?) and what kind of lubrication do I need?

I've had no problems with it at all and it feels the same as when I first got it, but I wanted to ensure now that it stays that way :p.

Thanks guys.