Hmmm... I think the lighter fluid would work. Depends on what solvent breaks down the rubbery stuff. I'd just start trying various household solvents. Apparently isoproplyl (rubbing alcohol) and xylene/touluene (nail polish remover) are off the list... So, one could start with the safest solvent and work from there. Try dish soap, baking soda (with water), amonia based cleaner, degreasing agent, metal polish,... Eventually you'll hit on something that works. Of course keep in mind that some solvents will eat into the plastic and should be ruled out for future use. Or you could just get one of those CD holder "books" and chuck your jewel cases. Heheh...

---

Barbequed Pixels?

Your friendly neighborhood Wings3D nut.
Also feel free to browse my freebies at ShareCG.
There might be something worth downloading.