I have a Fuji 6 x 4.5, which has been on the shelf for many years. Recently I took it out to resume using, and the shutter sticks. By sticking, I mean doesn't fire, although if I work the film advance lever several times sometimes it will, though after a delay of several seconds. I'm thinking it probably just needs to be lubricated, etc, so does anyone have experience working with this camera who can offer suggestions? I have no reservations about trying to do the repair myself, so if you have tips I'd appreciate it!