Over the last few months I have replaced my ignition switch cylinder(key) several times. It would become more difficult to turn forward to start the vehicle. Sometimes I had to use pliers to turn the switch far enough forward to start the truck. Eventually each time the small pin that was part of the key cylinder would break(twist off). Several weeks ago I replaced the ignition switch-the electronic part that the long rod goes into that is on the steering column under the dash. The other day the ignition key switch started acting up again. What else can I do?