Does anyone know if the silver finish on an instrument is in any way harmed by using a special polish cloth to remove tarnish? I have my old (2006) 2335 looking almost like new after buffing with one of these cloths purchased in a music store. The rag turns black fairly quick and this is what concerns me. When using an old (extremely soft) discarded T-Shirt to wipe down the horn, it turns black as well, but not as fast as the silver polish cloth. Anyway, the Yammie shines like new now!