Just slice through stitches. Then replace cover and use the rubber head to remove thread tails by rolling the head along the unpicked seam. A tool as useful as a pair of scissors. Cut and remove threads with one tool.
Dritz-Seam Fix Seam Ripper Purple A seam ripper that quickly cuts threads and a rubber tip on the end that grabs and removes threads This package
Dritz 665 Seam-Fix Seam Ripper, Large
How to use a Seam Ripper Quick Tip
Dritz Seam-Fix Double-Sided Seam Ripper
Seam-Fix Seam Ripper - 4 3/4 - WAWAK Sewing Supplies
Seam Rippers
Pk Ripper
Seam-Fix Seam Ripper Thread Remover,SF-100
Years in the making, Cindy, owner of Riley Blake Designs, has developed an ergonomic seam ripper, making it the best little unpicker. The unique design gives you more control. It's perfect for cutting threads and ripping out seams. Size is approximately 1 x 2. Patented.
Riley Blake Cindy's Seam Ripper
Seam Ripper (small) with Cap
Seam Ripper - Sew Sweetness