When Mr. Rourke and I replaced the lower panel in mine, i removed the cable from it's sheath and cleaned the cable itself with a scotchbrite pad and laquer thinner. Oiled it up with some LPS 1, sprayed out the sheath with Brakleen (that was a nasty mess) to remove the old residue then, reinserted and readjusted to proper travel motion. Smooth as peeled onion, now.
