First I pull the side plate on all my smiths when they get home. I clean them squeaky clean then lube them with a moly paste or antiseeze. All the metal to metal contact moving parts get lubed. Do not over lube it. Then I assemble the revolver and run the action while watching tv about 50 to 100 times.

The cylinder lockup might not be fully engaging too. Oil when it gets old looks like freckling and can get sticky. Remove the side plate clean it good.

I like to fix things myself. I modified my own 1911