Hi Everyone, Been loving my newly acquired SX-1250 and want to clean the RCA connectors. There is something on the outside of the RCA connectors. I used very fine steel wool along with DeoxIT to clean the metal "jumpers" to get what looked like rust off of them. Don't know if it's dust that has settled over the years but after cleaning the outside of the RCA's with DeoxIT, it is better but still present. Will using fine steel wool on the outside of the connectors cause any damage to them?