I saw that it's on SkunkPharm's to-do list. GW Pharm already has a patent on a method and device to do it (http://patft.uspto.gov/netacgi/nph-...=G&l=50&co1=AND&d=PTXT&s1="US+8445034+B1"&OS=). Cavitation is used to remove, not only dirt, but mold, oil, blood and plenty of other adhered contaminants from just about any material. Kind of makes sense that it would knock those little trics right off the plant matter. Using slightly heated Everclear might work for a solvent. Glycerin would be nice. Just tossing it out.