Maybe I do not fully understand, but what if...

you hold the body so that the advance lever points slightly downward and squirt a bit of lighter fluid into the film advance crank area. It could just need to have any oil residue cleaned out. I say 'point slightly downward' so that you do not get any fluid into the prism area. Perhaps removing the bottom would be best here so that the fluid can escape (if you squirt enough to fall all the way though). - David Lyga