If you find it needs more than just a gentle cleaning, there is an outfit in Wichita, Ks. called Bowtiebits that does this sort of work. I'm not plugging their shop or work, but just telling you of another of many places that can fix your troubles. From what I've heard of them, they are doing good work and reasonable rates. Hard to come by in todays world. Wouldn't hurt to give them a shout or look them up on the web and see what they have to say.
Tramp
