if u soak it in water (weed) for awhile some of the impurties will be removed the water will turn green from the chlorfill and this will not affect the potiencey but will give a less earthy taste don't use realy cold water because this will cause the resin sacks to break free from the bud/leaf but on the other hand if u want to make hash u want the resin sacks to fall off then strain through a coffea filter this is just a brief description it takes time to make the hash and u should ref5rigerate the weed over night and use cold water with ice in put it in a container u can shake the hell out of or use a small hand blender their will be some foaming u have to let it settle for awhile