So, my shears got hot, and now they run but don't cut. Only used them a couple of times. I can't figure out why they don't cut, as they seem to work fine until they hit the fur...Then they just bog down and stop. I have adjusted tension all sorts of ways...plenty of oil... heck they are just about brand new. I must be doing something wrong, but they cut well on the first sheer. Now, nothing works. What am I doing wrong here? Ideas or Help?