I have had a problem a couple of time with my tow bar binding when I go to unhitch. ?I have a Roadmaster Falcon 5250. ?It has a button on the top of each arm that is supposed to loosen the arms so that there is no tention. ?The last time I was at a campground it was so tight I started to wonder of I was ever going to get the car unhooked. ?Has anyone had this happen? ?Do you have a tips or tricks to keep this from happening or to releve the tention if it occurs?