I have a good bit of carbon build up on my M1 Carbine. I've gotten as much as I can but it seems to never end. I've used some Hoppe's No9 an some elbow grease and it seems to be helping but not much. Is there a product I can use to break down the carbon or help? The only thing I've shot out of it is 50 rounds of Tula (I know, I know, Tula is garbage and I didn't know until half way through the box) and it fouled it up so bad.