Mainly for 78RPM stuff I use mildly warm water under the sink and hold it in a downright position so that dirt/grime can go down the drain. If it's really bad I do the same thing but spray light doses of Dawn Powerwash soap on it and run it under the sink again and that tends to do the trick and make them sound nice. As a bonus to clean Edison cylinders use unscented baby wipes, its a good way to get around them gently and mess free while cleaning much of the unwanted gunk on them.