1 week soaking in fridge:
(Not doing dry-ice, but wanted to show how “clean” the material is)
With no agitation/stirring, just sitting in the refrigerator for a week, 1/4 lb material held down by ice to rehydrate, here’s an example of what an outdoor crop has on it. 
Granted there’s also some “good stuff” in the water (it smells good).
The minimal hash collected from soaking(maybe .5 g) was simply added back to the wash water.
