It's a good tip Brent. For washing one's grubby body in seawater, Dr Bronner's is brilliant. But, the story I wish to relate is about washing one's clothes. I had a netting bag, into which I would put my dirty laundry. Tow it behind the boat for half a day, then retrieve it and rinse. Works very well just as long as you tie a very secure knot to your bundle. On one occasion I was a little lax in this regard and lost some clothes, including my best boat shorts and t-shirt.
Streaming ropes over the stern is also a good way to clean up those that have got dirty in the anchor well. It also demonstrates the considerable amount of drag that could be a huge help when running in big seas.
"if at first you don't succeed....Redefine success"!