1976 Dart - ignition switch

Try some 3-in-One Lock Dry Lube.
To remove lock cylinder:
Place cylinder in lock or off position and remove key.
Insert a small diameter screwdriver or similar tool into lock cylinder release hole and push in to release spring loaded lock retainer. At the same time pull the lock cylinder out of housing bore. Then you'll probably have to take the lock cylinder and and key to a locksmith.