Having some problems getting my cooper clean,at least i think I am) I use a combo of nylon brushes, patches and butches bore shine. I start out with a soaked patch, then 5 strokes with a soaked nylon brush, 5 wet patches then a loose patch soaked in butches which I leave for about 15 minutes. Then another 5 wet brush strokes and wet patches till they come out clean and then I dry patch it until the bore is well dryed out, at this stage the patches are clean and the bore is nice and dry so I finish off with an oil soaked patch most times this oil soaked patch comes out with black fouling on it, even though the patches with butches where coming out clean, if I put another oily patch through after the first oily patch it has no dirt on it, where the hell is that first oily patch getting the dirt from? This happened a few times and after it did last night I repeated the whole process again but wasnt getting any dirt on the patches soaked in butches,none that I could see anyways).