How do you lube it at the moment? Shock fluid is what I use, but mainly CRC/Jig A Loo are the more popular spray lubes, maru, shock oil, and Lubix are the popular liquid type lubes. Some people have used graphite, but I personally have never used it.
For CRC/Jig A Loo there are two main methods:
1) Pull out an edge piece, spray, pop piece back in, repeat with the edge opposite it (for example using the blue/red then the green/orange edges), work it in.
2) Fully disassemble, spray an even coat on all pieces (including the core), reassemble
For the liquid lubes just pull out an edge and squeeze a few drops in, work it in real well. Lubix says it's necessary to lube the core. Lubix(.com) has an instructional video on how to use their lube, and YouTube has plenty of videos as well.
The
wiki is always a nice place to go as well, especially the
Lubrication page.