It is easy to sharpen the dull edges of a sprue cutter. To do so, color the flat back or the beveled part of the jaws with a marker pen and sand the marked area using cushioned sanding pad of 400-600 grit across the jaws’ length. Ensure that you remove the dry mark of the pen evenly to retain the back and cutting angle intact for a better finish while cutting. Now, repeat the same procedure on the interior of the jaws.