Related question: What do folks use to clean the contacts at plug-in points, male and female plug-ins ?
I disassemble each connector from the harness one at a time, by pushing in on the locking barbs with a jewelers screwdriver, and once out I use a dremel with a wire brush attachment to scrub them clean.Then I bend the locking barbs back into position, use some dielectric grease on the connector and snap it back into place in it's respective place in the harness.
