I have an Alivio rear derailer that acts like it has lost it's spring tension in the part that bolts to the hanger, it also has the tension adjustment completely turned in to clear the top chain ring (32 tooth). This doesn't seem right to me, just started doing it recently. I have adjusted everything from step 1, but still have to have the screw turned all the way in to function properly. Any suggestions? Could it be wore out?