I empty my media after about 2 full loads. Which is about 800-1000 rounds of handgun brass. The dryer sheets due help, but found the media starts to take a lot longer in my tumbler to get brass clean after a couple batches. It is cheap enough for corn cob media, and I don't shoot a huge volume so an 8lb bag at Wally World for $3.52 will last me quite awhile--approximately 8,000 handgun cases.