I don't think I have ever washed a finished quilt I always prewash my fabric as I do not like working with all those chemicals I have 3 battings I use soft and white --warm and natural or hobbs 80/20 and I always put my batting in the washer we fairly warm water let it sit and soak at least 15 min. then spin and dry that has always been the safest way for me and I use to make quilts for shows but have given that up now