Originally posted by Multi-coated Hhmmm..... I had the same problem on a PnS once. Specifically the four navigation buttons. A few drops of lighter fluid per button worked like a charm. I did exercise the buttons some before lighter fluid very rapidly evaporated. If the source of the stickiness is something sugary then an alcohol would likely be a better bet. Isopropyl, vodka? To the best of my knowledge the lighter fluid or alcohols should do no damage to plastics or metals.
No no no...
Rinse slowly under hand warm water. No chemicals! The seals don't like chemicals but they like water. I had a grain of sand or something that made the front dial hard to turn so I rinsed it while turning. As good as new after.