I don't have a pic but I am sure many of you guys know exactly what I am talking about... that brown splotchy staining that seems to be commonly found on the rubber silver wire sleeve that covers the wires coming from the V-Star handlebars. I've seen some bikes where the entire rubber sleeve is like that, others, like mine, have just a bit. What is this and how can I remove it? I tried some Simple Green and it didn't really do anything, then I tried some Comet with a wet rag and that helped, but there's still a lot of staining. Could I use a 2500 grit wet sanding pad or is there something else I can do?