I always put my fabric on gentle cycle, warm water, then in dryer till just damp, then iron carefully, before I use it in quilting or any sewing project. I wash with just a drop of laundry soap after the quilt is finished and toss in dryer, because, I like the crinkled look of it and just get it clean before gifting, as most quilts I make are gifts. Knock on wood...I've never had any issues.