Smaller pieces...put them in a salad spinner with hot water and soap/detergent/whatever. Let it soak...then swish, spin, rinse, spin, rinse spin. Pieces wont tangle like in the washer and you will freshen the pieces. I'm alergic to sizing in fab so I do this with fat quarters.
So glad you found such a good bargain! You will spend hours fondling, dreaming and playing with it. What a wonerful way to add to your stash. We are all so happy for you.