Some fabrics ravel when they are cut into small pieces. Using Frey Check is a lot of work and makes the edges stiff. I would use a smaller stitch and a larger seam like others have suggested. My Omigosh quilt sheds like crazy. I have to used my lint roller every time I work on it. The seams aren't getting any smaller and the threads are very short, probably less that 1/2 inch. The fabric is all cotton quilt shop fabric. Name brands so that isn't a factor.
Sue