Hey guys!! Got another noob question for yas. I've watched instructional videos on you tube for cleaning the GP100 without having to take it apart (don't feel comfortable) and for some reason I cant get rid of those carbon circles around each chamber of the cylinder facing the barrel. I've tried Hoppes # 9 solvent with a bronze brush and also tried one of those CLP all in one solutions. I did let it sit for a little while before trying to clean it but no luck. One thing i should mention, I didn't clean the gun as soon as I got home from the range, don't know if that's important. I'm really hoping it's not permanent. You experts out there have any tips for me?