I would just go with a "Bore Snake". My friends, family and I use them and they are great!! Obviously they are not for scrubbing but for everyday cleaning. After a few uses we just put them in an old sock, tie it shut, and through it in the washer. Comes out as good as new. They have a brass bruch built into the front of the snake and after 2 - 3 passes your bore is clean as can be.
Long