I recently got sufficiently frustrated with the one inoperative window to find out why, and discovered one end of the cable disconnected. I disasembled the whole thing, cleaned everything using some of the excess grease around the spool to lubricate the track. Since the cable was kind of munched in places, I was totally expecting it to jam up, but it didn't & worked beautifully for 3 days. It was quieter & faster than the other 3, but now stops an inch from the top. A replacement unit was sourced, but before I install it, I'd like to clean & lubricate it.

what to use?

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1991 300D