I recently noticed on my bike that the brake cable housing is shaking at the point where it joins the brake caliper. This is pretty irritating since the cable housing moves whenever I use the brake.
Here are some pictures
Notice that the metal ring on the cable has moved between the three pictures.
I usually hire a professional to fix these problems but have decided to do it on my own from now. I could not find anything from some google searches to solve this.
Any suggestions?