by Kaotik » 19 Oct 2006 22:42
If it's a new lock, then no lubrication is needed. If it's a used lock that doesn't seem to be in bad condition then try graphite (but not to much).
If it has been weathered for some time then use a liquid lubricant with ptfe in it, this can also be used to fluch out any dirt or contaminants that may have built up in it.
When the lock has not been in service for a long period of time, then soak it in WD-40 and hang or set aside to drip dry. *NOTE: Putting graphite in locks with existing liquid lube can create a muddy substance and make picking difficult and may need to be flushed again.