Because of Arthur-itis taking over the use of hands and wrists, I only tie now days. (always hand quilted) I use embrodery floss, and tie rather closely. Probably only 1 1/2 inch apart on last quilt. Double tie the knots with a sq. knot. I have had no problem with them. I tied some throw around quilts many years ago, using yarn......which I dislike....and the darn things are still going strong, after 4 kids and MANY washings! I have matched the embrodery floss to the fabric, and it is difficult to even see the ties. I rather like the look. Try it, you may like it!