To clean the threads of the rifle.. I like to get some hot water and dip a breech brush in there. Pour some hot water over the threads. Then place that wet breech brush part way, starting in the threads.. Now put a good squirt of dish soap on that brush and work that back and fourth and spin it clockwise until I work up a heavy foam lather. Then pull the breech brush and flush the area with more hot water. A small flashlight I then use and I inspect the threads to make sure there is no fowling on any of them.

After that I take some cloth patches and I put alcohol on one and work that over the threads of the breech. I then start a few dry patches until those threads are clean and dry. After that I like to put an oil patch over the in the threads. Then when I apply the cleaned breech plug back in, with a good thick coat of Slick 50 One Grease, I know the threads were cleaned, dried, oiled and now coated with grease. I never had a rust problem yet..