Just wanted to share with all of you, if you weren't previously aware:
http://www.de-solv-it.com/all-products/contractors-solvent/
This stuff works miracles! It actually smells pleasant and is easy to use in a spray bottle. It's not harsh on surfaces like some other stuff can be. Hands down beats anything else I have ever used!
I used to swear by Lighter Fluid, but it was not always easy to use, especially on larger surfaces. Now I swear by this stuff. It's a staple of my drum repair toolbox!