I agree with NCBob on this one. When I have had difficulty with removing the cleats, I've found a couple of things that work. First, make sure the spike wrench holes are clean--no dirt or junk in them, so your wrench can get a good grip. If they are and you still can't turn the cleat, try lift in on one of the tips with needle nose pliers while attempting to turn the wrench. If they are still stubborn, drop a little oil onto the cleat and wait a couple of hours for that to loosen the clogged dirt. Then go back at it. It may take a while, but I've had good luck following this routine.