It is normal to lube the universal knuckle joints, as they are metal on metal spinning all the time.
I am sure when it was new, everything tight, the grommet within the eyebolt was enough to keep things taut.
If you have issues with things so lose nothing stays, I would get a short black rubber tie down, hook on end way from the chute rod, around the chute rod, and back to the same or near the hook point … i.e., just enough so you can spin the chute, but yet enough to hold it there where you want it. You can also get fancy and grove 2 pieces of plastic, like a cutting board, and sandwich the rod in between, screw it down, thus creating a taut, yet movable rod. Many creative ways to do it, but the tie down is probably easiest and quickest.
Or as tabora states, try a new grommet.