I love the Crayola washable markers, but have found the easiest way for me to remove them is to soak the finished quilt in the tub in cold water overnight, then wash (large front loader machine) the next morning. I use a laundry basket so I don't stress the wet seams manipulating the heavy wet quilt. I began using this method after one of the colors seemed resistant to rinsing out of the quilt, and have never had any problems since.