You will need to get a fish-net laundry bag with a zipper opening. Clean all of the grass and other debris out of the fleece OR garment.  Place fleece or garment in bag and put aside for now.  Step one, in your top loading washing machine or a deep sink run luke warm water and a light soap we use  dish soap.  Once the washer is full, place the fleece or garment in the washer and make sure it gets totally submerged inside of the tub or sink.  Let it sit there for about 1- hour. Adjust the washing to the spin cycle to remove all of the soapy water out of the fleece or garment ( DO NOT AGITATE THE WASH ).  After all of the water has been removed , take the fleece or garment out of the washer or deep sink and lay it aside. Step Two, fill the washer  or deep sink and repeat the process including adding the soap and letting the fleece or garment sit submerged inside the tub.  Again do the spin cycle to remove the soapy water. Step Three, take the fleece or garment out of the tub or dep sink and fill the washer with nothing but luke warm water. After the washer or deep sink is full then put the fleece or garment back into the washer or deep sink to soak for 1-hour.  Fourth Step, repeat this last step one final time.  Finally you need to get screens like from outdoor screen doors or windows to put  the fleece on to dry, put the fleece outside,  if it is windy use two screens one on top and one on the bottom. For the garment use a towel or two and put it on a flat surface to dry completely before you put the garment up. Check the fleece every hour until dry, put in Rubbermaid container to store.