My advice is to use lithium grease, and eventually when it begins to gunk up, a quick blast of WD40 to clean it, then re-lube with lithium again. Repeat to infinity.
Are you talking of the locking mechanism or the part of the lock that engages with the shackle? I thought you used to recommend graphite lube for the mechanisms.
My advice is to use lithium grease, and eventually when it begins to gunk up, a quick blast of WD40 to clean it, then re-lube with lithium again. Repeat to infinity.