I've been using the RCBS Sidewinder case tumbler for like 20 years, with the RCBS wet cleaning media. Basically just a concentrate you mix with water, fill the tumbler and let it roll baby. Does a great job cleaning cases, and can be used multiple times over if you filter it after each use. I dry the cases in the sun on a large aluminum sheet in the summer, or in an oven during the winter. No problems with the cases over all this time.