How do I clean under my toilet bowl black ring and inside ring?

Hello, My solution was the pumice stick. This is excellent way to remove stains and rings in the toilet. When commercial toilet cleaners fail -this is my go to. Great for thick crusted calcium mineral build up that the toilet waterbowl collcts.

They are found at my local Walmart for less than two dollars -good for multiple uses. Be sure to follow the use instructions, soaking the pumice stone in water for a few minutes. While the stone is soaking, grab your toilet brush and splash water up around the ring. Note: It’s very important to keep both the stone and the surface wet while cleaning to avoid scratching your porcelain.

I soak paper towels in vinegar and then put them on the rim jets. Let it sit about an hour and then use a toilet brush and some comet and scrub and then flush.

baking soda mixed with Dawn dish soap into paste scrub with brush then add some vinegar(lots of fizzing) clean it regularly and you won't have ring------The hard water deposits under your toilet's rim provide a breeding ground for the mold. Mildew grows under the same conditions as mold. Mold and mildew can appear black and will cause respiratory problems for people as the mold and mildew release tiny spores into the air.