Hee, hee, hee, here is one for you Walt.
I did an interesting experiment by which I collected all my roaches and bowl cleanings in a jar for about six months and then filled the jar with ethanol to dissolve all the remaining essential oil.
I then filtered it and mixed it with hexane and salt water, before shaking well and separating it using a separatory funnel that I make out of a Ziploc bag.
I then poured it into a pie plate and blew away the hexane with a fan, to yield the concentrate you see in the last picture.
https://graywolfslair.com/index.php...e/10-3-pentane-hexane-heptane-and-brine-wash/
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