This is from personal experience. The mirror/camera is like a dust magnet. Any little dust particle will be magnified. If you try to clean the mirror with the enclosed Q tips, it will only make the problem worse. Fibers will catch on the sides of the opening for the mirror/camera. Buy yourself a can of compressed air. The type used for cleaning computer keyboards. Use that to remove dust particles. BTW the enclosed Q tips will not fit into the opening, anyway.
If you have to clean the mirror/camera, I found a small piece of paper towel (just the edge of it folded over) wetted with the lens cleaning solution, "gently" moved across the mirror works well for removing stuff on the mirror/camera. Use a bore guide to keep the camera centered
AND
If you just cleaned the barrel, make darn sure it is dry before you stick the bore cam in. Getting any of the cleaning products on the mirror will ruin it. The reflective surface of the mirror is not protected.