Working through the second slipper with fuzzy yarn mixed with bulky. I thought the mistake was two rows too long, then sewed up the top. Suddenly a big hole appears from a dropped stitch, growing bigger. I can’t get the construction stitches undone, too fuzzy to even see where they are. It will take more time to UnDo this mess than it took to make it. Fuzzy yarn is not difficult but it gets “out of hand” if I am not attentive enough, watching to secure each stitch.