Door handle problem

All of my door handles on my 97 Aurora seem to be sticky, I have cleaned them and oiled them with no change in result. All the doors open but you have to pull the handle like normal, then give it a little more. It is this way on all 4 doors. For a little while last year the passenger door was giving me grief and the power lock was sticking and the only way to unstick it was to play the lock. You could not unlock it manually. If just seemed to not go far enough to unlock. The handle issue has been the same since I got the car. I love the car, I have 2 of them and a fleet of devilles so I am framilliar with the commom issuse but has anyone had THIS problem? Its really buggin me.