Okay, pop off the speaker grill (carefully, Fiat plastic trim is fragile! Seems to be a little bit more brittle than other makes).
Undo the retaining screws, remove the speaker and unclip the connector.
Undo the bolts holding the door handle plastic module and remove the handle from the wire locking rod., disconnect the electric window switch and this should separate from the panel.
Get a very thin screwdriver and lever the red insert out a little on the locking knob to release the door locking rod..
Using a fairly broad tool, lever the panel off starting at the bottom, try to get a couple of levers either side of the clips.
Once all the clips are off, panel should lift up and off, when you put it back on make sure the window trim at the top locates correctly on the inner steel panel.
Undo the outer handle by undoing the two hex bolts, pull the handle out enough to release the clip and actuating rod, dont lose the clip!
You can now properly lubricate the hinge, I used a light grease once I'd cleaned it up, seems to be better at keeping dirt out.