I usually buy fleece and do my own preparation. For that I use my mini combs and my carders. I try to use as much of the fiber as possible and make as little waste as possible.
I do love combing. The way the wool transforms from separated staples to a fluffy bundle is like magic. And drawing the fiber off the comb in a long, continuous piece is very satisfying.
The longer fibers align themselves into that long combed piece. But usually there is an amount of shorter fibers left in the combs. I pull these out, one pinch at time, and card. The nepps and noils stay in the combs and I use this waste in the garden.
I follow the same routine when I card, but without making the combed bird’s nests. I lightly comb the fleece I want to card, pull it off the combs one pinch at a time and then card. This way, I use the combs for teasing the wool. It is much faster and nicer than teasing each staple with a flicker, which I used to do. And now I love carding too!