3 floyds bottles have been proven to wash yeast by themselves with no effort.
Fill the bottles with yeast cake sludge and leave in a warm moist place, preferably a barn or out house.
Around midnight, the yeasty wash fairies will swoop in (assuming no bears are near) and scrub each little yeasty with their little lufas.
SO DO YOU WANT THE DAMNED THINGS OR NOT????!??!?!??!?!!!!