First, wash the wool. See the FAQ on Washing Fleece for help with that. Then, once it's dry ...
Before carding I'll either use a picker to open up the fleece or sit with two bags and a towel in front of me -- take fiber from bag 1, open it up over the towel (to catch chaf, etc), put it into bag two. Repeat until bag 1 empty.
I find the fiber cards more smoothly if I pick it open, with a picker or by hand, before I card it.
posted 14 January 2007 at http://askthebellwether.blogspot.com/