I opened my wife's junk drawer to look for scissors and found a pair of Safari Pet Toenail Clippers. They have blades that encircle the cat or dogs toenail and that works great for the line. You can circle the line with the jaws, pull down to the hook loop and put tension on you line and cut right through the knot completely freeing the lure or hook.
They are also very sharp, tight and precision. You can get them at Rainbow Agriculture and at most pet stores.
