This morning I was shooting air rifle at our local indoor range. We shooting upstairs. I came down the steps and the manager was talking to an individual. I saw a brand name bore cleaning agent on the counter, a broken down 1911, and some dirty patches. The manager , Jerry, introduced me to the sales rep and said to him as he introduced us," Sell him and I will buy some". Rep, a very pleasant man in his 50s who I found out was a retired Marine asked if I cleaned my guns and how. This lead into a discussion on carbon and copper. He proceed to tell me he could prove to me my guns are not clean. Ohhhhh, my game face is on.I said, " Wait here I live 5 minutes away." Back I come with my 6ppc and cleaning box. He hands me a patch saturated with his product and said give it 30 strokes. Ok. Bore guide in and 30 strokes later I handed him a totally clean patch. He shook his head and said, " Twelve and a half years of doing this, first clean gun ever." This is the short version. He was a nice man but ran into the wrong guy. He had never heard of Iosso. I have lots of experience in bore cleaning debates, lol. Chalk this one up for the Accurate Shooter guys.