if you havnt allready tossed them.. this is what I did with my male plants, Take dried males and crush them up into a fine powder.
Put the powder in a jar with 99% pure Isopropyl alcohol or 190 proof grain alcohol, so the alcohol covers the powder.
Soak in a dark place for anywhere from a couple of hours to a few days.
Pour the mixture through a screen onto a glass plate. A fine kitchen strainer or gold coffee filter work well.
Evaporate the liquid carefully. This can be done either by letting it sit out in a warm place or by heating it up. If you're going to heat it, be careful...it's flammable. Do it someplace with good ventilation, preferably near a kitchen exhaust fan that blows outside.
Scrape up the tar with a razor blade or spatula. Try to choose a pan or bowl that won't be harmed by a razor.
If it is too sticky, add a little dry weed powder till it attains the consistancy of silly putty. Work it over and over. This seems to make it bind together.