Let me guess, your cleaning rod is made of brass?
Dump it for a coated rod ASAP. Any chemical capable of removing copper from your barrel will also attack the rod. That's why it keeps turning green.
While you're at it, ditch any bronze bore brushes you may have been using. Using a bronze bore brush with any kind of copper remover (even crappy Hoppe's #9) will just smear copper all over the bore as the cleaner attacks the brush.
As for the extra carbon, foaming bore cleaner is really good at getting into places where regular patches don't reach, like your gas port and the nooks and crannies of your muzzle device. Don't worry about it! The carbon in those places is not such a big deal and the foam is helping to keep it under control![]()



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