My CB750K4 parts bike ignition switch only has 4,700 miles on it. I am looking for a recommendation of a good contact cleaner for it. I tried some zero residue cleaner and it worked good, but after it dried no difference. Contact is still a bit shakey. I have some liquid graphite lock lube, but hesitate to use that as I don't want to gum it up...or is that what I should use? Thanks...