OIL EXTRACTION BY BUTANE Hi Guys, Its my first time making Oil and need your expert advice. In a tube 3/4 x 18 filled with Buds only, I have already used 26 oz of Butane, the oil is still coming out but dark green. I saw a posting suggesting to wash the tube and the MJ at the end with Iso 91%, what do you say? How much additional Butane should I use? Cheers