Fullers Earth and Comet will gum up. I would use a mild cleaner/degreaser and clean up as much of the excess lube as possible. The combination of a light car and counterweight, and over oiling the ropes will definitely cause traction problems. I just Inspected an MX10 that was tearing up the Drive Sheave after they re-roped it. those ropes had a dry hemp core and no lube. These things are a little sensitive, too much either side of perfect and you lose traction, or tear up a sheave.