I use water with a dab of dishwashing detergent to clean all of the metal parts, including the lock. Then I lube the lock where necessary and use some rust preventative like EezOx.
I wonder if it would be work better to put the lock in the ultrasonic cleaner I use for cartridge cases and metal parts of "suppository" firearms. Is there any risk to removing the case hardening, both real and fake?
Ron