Soooooo, the question is what was used in your pieces???
If it was combustion, I would suggest pitching the alcohol, though I have recovered that and worse. Unfortunately, they contain carcinogenic byproducts of pyrolysis, besides tasting like hammered shit.
I offer the following tongue in cheek process that works slick, but leaves the extract still tasting like an ash tray without further processing with activated charcoal.
http://skunkpharmresearch.com/getting-the-green-and-waxes-out-afterwards/
If your pieces were all vapor pipes, I suggest just pouring off and filtering the alcohol and evaporating it away like a conventional QWISO extract.
It won't have any monoterpene flavors, but will make a fine sleep med.