The health industry has no reason to cure patients. On the contrary, they have reasons to create new patients. And it's across the board. I tell myself exactly that when I look at my toothbrush. A toothbrush lasts about ~3 weeks before needing replacing. I'm sure someone in the industry will tell me that it's because it's made of unobtainium unicorn hair specially designed to make my teeth whiter and all that. I also…
After a period of time the toothbrush too will become a colony of bacteria. It will then add to the existing problem or at least offer no benefit. This is why you should change them so often.
The shotgun cleaner is not used to remove bacteria primarily and will not suffer the same issue provided the particles/grime can be removed from it.