What temperature are you running your recovery pot during distillation bro?
The stuff that looks like water, could easily be pentane, which boils around 100F at atmospheric pressure.
It also makes a nice extraction all by itself, but is harder to purge than butane, so we take ours out.
We ran a tank of n-Butane from Ecogreens original shipment and a tank of n-Butane, Iso butane, and Propane from their following one.
The first we had analyzed by a third party forensic lab, but not the last group, having no reason to suspect the contents are changing significantly, only the levels present.
We removed mystery oil from all of it before using it, and ran the butane to test new equipment, usually with a dozen or so runs without columns, to test for fit and function.
We conduct a final cleaning before shipping, so we observed what was deposited in subsequent passes, and we observed very light pentane deposits, and nothing else of concern.
The stuff that was deposited the first run, was stiff and hard to remove, even with hot denatured alcohol, and was light yellow in color.
)
I'm so impressed! 
