Mix some drainol up in a plastic pail of some sort. Then throw all your brass in there and let it sit over night. The next morning, dump the water out, and dump your brass onto a big towel spread out on the floor. Dry the brass as best you can.
Next (make sure the wife/girlfriend/mum isn't home) put your brass in a cloth pillow case, and throw some steel wool in with the brass. Tie off the top of the pillow case. Throw in a towel or two into the drier, and put your pillow case in with it. Run for about an hour.
Works pretty good.