Holden Oversoul
New member
None. I've never used it for anything but washing the extraction out of the lower pot after extraction. I'm pretty sure it would end up contaminating the butane in the recovery tank, just like it will pick up water given time.
Additionally, if the butane were contaminated after x number of runs, could the butane then be distilled (per GW's procedure on the SPR website) to remove the alcohol,water, and other contaminants?