I am very gentle with my snake, and I mostly do residential mains. Now yesterday a guy had me camera a very bad collapsed line and I tried to force it a little more than usual, everything went fine and I got paid and left the job. Now later that night I had another call and when I was camering the line I noticed on my monitor that there is a horizontal faded line right in line with the distance meter. I'm wondering if I damaged the cam head in some way? I hope not, but I know it wasn't there before. Any ideas?