I recently purchesed a brand new Martin Cheetah, and the string has come off of the idler wheel twice; once while practicing and another left me with a large cut on my shin from my broadhead. It has never been dropped, dry-fired or mistreated at all. I am already in need of a new string because of the fatigue that occurs when it comes off. I wax after every shoot/hunt; I baby this bow. Can someone please help me try and figure out what is going on with my bow? I love Martins, but this one is just plain getting dangerous.