Woolite isn't recommended for use by textile crafters (such as quilters and other needleworkers) because it contains optical brighteners. Plain ol' laundry detergent will do just fine. If you're dead set on handwashing, get a quilt soap (or save money and pick up a gallon jug of Orvus from your local feed store--it's horse shampoo--and since you're only using a pinkie-finger's nail's worth, it'll last a very long time).

Condorita, textile crafter