yeah i made sure i had cleaned mine, but after so a few thousand miles its going to get bad regardless. i might try stainless steel cleaner on it and see what happens. idkYeah, that's about the only thing that ever gets burned onto my header...lil bugs getting roasted. Bad thing is, once it's stained....it's stained. I can't stand when people don't clean it before the first use and it ends up turning a dark brown from the natural oils in your hands.