The staff at Fingerlakes is surprised at the number of orders that come in unskirted. This is something to be done at shearing time. It will cost you more to have skirting done at the mill and if your product is too contaminated, it will be rejected. Instructions for Home Scouring Skirt your fleeces by removing the belly wool, any manure tags, matts, burrs and chaffy wool. It helps if you attempt to pull the fleece apart, or pick it somewhat, before washing.
Smaller pieces makes all the steps easier.
Do not use detergents that contain phosphates. Add as much fiber as will stay submerged. Do not agitate. Rinse at least twice using water of approximately the same temperature. Squeeze or wring the fibers to remove the water.