try the cap cleaning fluid, in very small amounts on a paper towel. since it is the same chemicals as the ink itself, minus the pigments, that is the only thing that would remove it.
or you could wet a lint free wipe and place it under the rollers and hold it in place whilst you spin the rollers to clean them. when ever this has happened to me the ink dries and then the marks go away. the only problem with leaving the ink on the rollers is that you may induce media slippage..
