hello sorry for my terrible english and thanks in advance ... I explain ...... I put a jar in the freezer 1lt x 24h with twenty grams of flowers ... then I put the butane in the freezer x 4 hours ..... after made holes in the cap 1 x bottle and 4 x venting (pressure) ..... downloaded 2 cans about 1/2 liter into the jar and taking about 1 minute slightly twisting ..... filtered with filter coffee in the baking dish and evaporated ....... final product excellent .... an invisible veil that becomes light lemon color but the crop was tiny ....... after a few hours I rehearsed the same grass in the tube (honeybee) and I picked up a product more dark but still great ...... and with a yield similar to the first ...... now ..... looking with the micro I see that they always have a a lot of heads ....... I have to do a third step?? ...... where am I wrong??? there is no way to do all the job in one step?? .......