Whoa whoa whoa. Don't touch those things.
Basically, it's a disc of plastic with a small brush glued to it. If any crap gets caught in the bristles, or if the brush is not all that high-quality to being with, your drive's laser lens will get scratched to oblivion and you will be even worse off.
If you never touch the lens, there should be no reason to clean it. In any case, just a cotton bud dampened in rubbing alcohol will clean it fine.
23/04/2008
I'm in your profile, deleting your spams for Great Justice.