I also have several and like them fine. All shotgun bores and I had one for every rifle I owned. A quick pass now and then when in the field kept me confident that I hadn't messed up somehow during the day when paying attention to everything but the gun. Small things in the bore can make a big mess. I put them in a mesh bag and run them through the washer when they need to be spiffed up. By themselves, of course. I've had my 12ga for well over 10 years.
Creativity is just intelligence fooling around