Use brake cleaner liberally (in a ventilated area where the overspray & drips won't damage anything) to clean all the old grease & worn metal out of the cylinder's moving parts. Run the key in & out several times to work the cleaner in & break up dried grease or other contamination. Keep spraying until it runs out clean, then allow the cylinder to dry thoroughly AND return to room-temperature (or warmer).

Owner caption September 2014 · Photo 0 of 5000