door handle button sticks

My husband did spray pb blaster around the button. I think it helped a little, but it still sticks occasionally. The inside handle moves fine, but just won't open the door. I only thought that the lock clip might be broken, because it locks on it's own. I will need to take the panel off eventually to fix a rattly window, so maybe I'll look into getting the stuff I need for that, and then see what's going on when I have the stuff! I am thankful for my bench seat, it makes it easy to slide over! Thank you both for your help!