After getting the undesirable bits off the wool and the long hair's give the fleece a soak in Luke warm water to loosen up dirt. Hot water is more hygienic but will remove more of the lanolin from the fleece. Consider if you want to 'spin in the grease' (lanolin) or not. Poor hygiene could result in disease, infection or mites. Which is why some people prefer not to 'spin in the grease' or 'full grease'. Others love having soft hands and don't mind washing and changing before meal prep.
