Recurring subject: Goo removal

I was going through some of my old equipment and decided to see if my old DDS autochanger still worked. I powered it up and, after many whirring and "SCANNING" "LOAD 01" etc. messages, it gave me an ERROR 10. Upon opening up the unit, I discovered that the rubber rollers that manipulate the magazine as well those that actually feed the cassette had turned to black goo and spread it all over the place. Alcohol wouldn't cut the stuff, so I tried mineral spirits. Better, but no cigar. Lamp oil was even better, but I finally settled on Coleman Stove fuel. Not perfect, but at least I got things cleaned up. I'm probably not going to do the next step any time soon--replace the now-gone rubber feed rollers. I don't need the drive (although it can read DAT audio tapes, which is kind of interesting) as I have other DDS drives that work just fine. Maybe a rainy-day project when I'm looking for something to do. Does anyone have any preferences for a goo remover? I've heard that Ronson Lighter fluid also works well. --Chuck