I take the other approach. I've pretty much stopped cleaning my screen so that after a few days it has fingerprints everywhere. To me it looks less messy and annoying than a mostly clean screen with a few random dots where I've done the most tapping (mostly in the keyboads area) and a few lines and other marks where I've done swipes and drags.
I would love to keep a completely clear screen though. With all these threads about fancy features that should be in future iPads (retina display, huge CPU and memory increases, fancy cameras, etc), the one thing I would really love would be if Apple could find the technology somewhere (it probably doesn't exist right now) to take the oleophobic coating to a whole new level where it stops fingerprints in the first place rather than just making them easier to wipe off.
- Julian