Deb, I have just read with interest on my Bernini blog about this same problem. Although this was a problem after the quilt was made, but this should work for material washing. All have suggested using dawn dishwashing liquid. Most have said not to use all the products you have tried(I have used those also). I don’t know if after using them that this method will work or not. Soak in the dawn dish liquid and make sure no material is poking out of the water. Repeat until water is clean.