Sou should use wd-40 to clean them out as best you can, if you have the key spray inside the lock and put the key in and turn it around a few times to loosen up the crap tapping out the extra wd-40 on a rag. Then use a spray can type brake cleaner to get the wd-40 out, then the lock should be tapped on a rag to get out most of what brake cleaner is left inside the lock. If you have an air compressor you can spray out the remaining cleaner, DO NOT GET IT IN YOUR EYES. After it has dryed completly (should evaporate within an hour or two) you add the graphite.
Graphite cant be used to clean out a lock, just to lubricate it. If you can take the lock apart it make for cleaning it a whole lot easier, and may eliminate the need for wd-40 all together. Hope that helps
