sometimes if i'm in a hurry, i've taken off the grips, and held it under the hottest running water i can stand, then wash it out with WD-40 several times, just to be safe let it drain, wiping it off each time on the outsuide with paper towels, then clean the threads on the nipples, and check for any outside deposits of black powder. oil inside the barrel at the end. put it away, but check it after a couple days just in case.