Cassette deck or Reel To Reel? I searched brand names of aromatic hydrocarbon and came across one called "Norsolene". It's described as "tackifying" and, in certain versions, suitable as an adhesive and for book binding. I don't like the idea of 'tackifying' a pinch roller but, then again, maybe in the tackifying as opposed to adhesive application, it is just like those rubber restorer products. I use warm water with a bit of dish soap in it (the same amount as you would use to wash dishes) and it works just fine when scrubbed in hard with a Q-Tip. Only a good idea if you can get the roller off easily though, in other words if it's an R2R. I've never yet cleaned a cassette deck roller and am currently looking at a pair from my car deck that are as shiny as a piece of glass and which I doubt I'll manage to remove without destroying the deck.