In the days of the old typewriter platens we (and the mechanics) used to use meths on a soft cloth. Improved the grip on the paper. My HP LaserJet 3100 book says to use isopropyl alcohol (whatever that is) on the exposed areas of the grey pick up rollers, (but not on the long black sponge roller, if your model has one!).
I know that your thread is now closed but as an ex copier engineer I would resurface the roller by lightly abraiding it with fine emery paper and the clean with ISOPROPYL ALCOHOL. It is available in brand form or neat from good chemists. It's also great for cleaning monitor screens, scanner glasses and when used in conjuntion with a soft cloth cleans DVD and CD surfaces.
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