I can testify that they turned what could have been a horrible disaster into an awesome miracle. I had always wanted to make a red and white Irish Chain with red embroidery in the blank white squares. Not thinking, I proudly stitched and sewed and quilted this quilt into a beautiful heirloom! ALAS, I realized that I hadn't prewashed the red and knew from experience that red is a horror story unto itself (the bleeding) and just sat and cried with thinking of all the hard work that I had done. Just by chance I was introduced (by tv commercial)the SHOUT washer sheets and thought that I really had nothing to loose- NOT ONE TINGE of red bleed onto my white and of course all my pencil lines were gone. SO, yes, they do work and if I remember I used COOL water and regular laundry soap- Lisa