I no longer gather the ruffle with the 2 rows of stitching like I learned way back as a teenager. I use dental floss & stitch a zig-zag stitch over it. Dental floss won't break like pulling on the bobbin stitches of rows of thread. Before pulling the floss to gather, I put pins to mark off the 4 sides of the quilt, so that I get equal gathering on each side of the quilt.