0.5 mesh sounds a bit large, the stuff which shud of came out the shaking should be a fine sand coloured dust, and it should already be dry when it came off the leaves and to press hash properl u need to slightly heat the skuff inside the foil then press it, i am not an expert hash maker but i have made some reasonable standard hash before, get some more info off the net, jus type in hash making how do i?