I just toss them in the kitchen sink with some soapy water, let them soak for about 10 - 15 minutes, then swish them around before draining, rinsing and finally turning them open end down in the dishwasher rack to dry a few days. Started doing it this way for my BP Sub loads, then just started doing it on all the hulls. It's much quicker/easier than wiping them down and I'm lazy... I tried (once) tumbling them in my vibratory tumbler, but they all came out looking like they were in a fire. All the carbon just adhered to the plastic, so that was a loser.
