Antiramie,
To take the filter out you will need to use a small allen key to remove all of the little black bolts around the base of the filter. After they are removed just slide off the cover and pull out the filter. As for cleaning .. Don't bother... a new filter will only run $10 from most places online. Its easier that way. Plus the weapon R filters really don't seem to last after a few cleanings. Hooked you up with some 5 star action..
-Nate
http://members.home.net/nate.is