Black or dark marks in toilet bowl
Inside my toilet bowl there are dark marks. You know... when you flush the water comes out of those little holes around the rim and flows down the inside of the bowl. Well, you can see the waters path. I have cleaned with Lysol Cling and scrubbed. I've tried bleach. I've taken a softscrub product and a green scouring pad that doesn't scratch and used a lot of elbow grease, but you can still see where the waters pathway is. By the way, the toilet is not leaking. We were gone for a little over a week and noticed this when we got back. Can't seem to get rid of it. By the way, the water is filtered twice before entering the house and we also have a water softener. Suggestions?