There is a detergent available at agri stores...like Farm & Fleet, Rural King, or whatever the name, where agri folks buy their supplies. The name of the detergent is ORVIS, very reasonably priced, very gentle, and comparable to the "expensive quilt soap", but doesn't lump up. The farmers, livestock people use it to wash their animals-all "areas"....so it has to be gentle, but good........I use it on our quilts and give it in a little baby jar along with a gifted quilt-along with instructions on "how to wash a quilt". I think that info is somewhere on the net........Just what I do....