I use a Thumbler Tumbler for wet cleaning. I have both ceramic and stainless steel media. I prefer s.s. over the ceramic. Just be sure that you clean the media after each use. I didn't clear after some Black Powder cases and the next load came out looking like Black Chrome. Very shinny gloss black. Washed the pins real good and ran the cases again, They came out looking new. Wet Stainless pins ( distilled water (water in my area has a lot of minerals in it so the distilled water ) 1 tablespoon of Dawn Dish Soap and 1 or 2 table spoons of Lime-Shine will look like new brass in 2 to 3 hours of tumbling. If they are really dirty it may take longer. Rinse the cases well and spread on a wire screen drying rack and sun dry for several hours to get all moisture from inside of cases. Wet tumbling with Stainless Steel is the only I have found to clean inside the case, primer pocket, and flash hole. just watch for pins in the flash hole after cleaning. After drying I resize and vibrate in walnut media and Lyman Turbo Bright for a couple of hours to remove the sizeing lube and final polish the cases before I finish reloading them. It took me many years to get to this point , I have rounds I have loaded that are several years old and they still look like new.