I wash ALL of my fabric and because of that I generally don't buy pre-cuts (I have, but I don't like to). I do however buy and wash FQ's. My FQ's go into the kitchen sink with hot water and a smidge of laundry detergent. Swish, soak for about 15 minutes, rinse, wring and toss them in the dryer. I get very little fray with this method.