I invented a different way to rip out a seam. I lift the first five or six stitches with the ripper, enough to grab, then go about an inch down and cut that stitch. I pull out the thread and turn the seam over to the other side. Several inches of stitches are loose, so cut a stitch about an inch from the end of the loose thread, pull the thread, and turn fabric over, repeating the cutting of the stitches seam and pulling the thread. The fabric does not wrinkle, there are no little pieces of thread floating around, and it is quicker. This method does not dull the ripper as quickly as you are not cutting each stitch.