Hard water is a common problem in many areas that can form a bad stain in the toilet. A regular pumice stone can clean a toilet better than almost anything else out there.
- Dampen the pumice stone in water from the sink.
Put on rubber gloves. Flush the toilet so you can get a fresh start.
- Scrub the stained areas with the pumice stone. Be careful not to scrub too hard as this may scratch the porcelain. Keep the pumice stone wet while scrubbing at all times to avoid unnecessary scratches on the porcelain. Use a little baking soda if necessary.
- When the stain is lifted, flush the toilet to rinse the area.
- Inspect and work on missed areas.