How can I clean a white toilet that is stained from hard water?

Hi Judy, this article will help - https://home.howstuffworks.com/home-improvement/household-hints-tips/cleaning-organizing/how-to-clean-mineral-stains-from-your-toilet.htm

You could use a couple of denture tablets, let it fizz and set overnight, then scrub out.

Invest in a 2 liter bottle of cola. Pour it in at night and let it sit overnight and then clean. An alternative is to put it in before leaving the house in the morning. I've used name brand, and the generic stuff and it all works. It removes corrosion and rust from metal, too.

Try a product called 'Scouring Stick'. It's pumice and available at Walmart.

Use a descaler, if it is not effective alone scrub with a scouring stick. Make sure to clean the jets under the rim as well.

A liquid product that comes in a slender green plastic bottle called C-L-R will work. Just flush your toilet, pour in the clear liquid (looks like water) and use a toilet brush to swish it around. Then leave it for as long as possible. (overnight at least) and then use a toilet brush to clean again. Your problem should be resolved. Worth a try.....at least!

Besides a Scouring Stick the best product I've found for our toilets (and we have very hard water) is called The Works Toilet Bowl Cleaner.

You need to clean the jets.

https://www.thespruce.com/cleaning-toilet-jets-2719011

I have tried the Coke trick and it did work. Empty the bowl completely of water, then pour in Coke (I poured it right to the top, because that is where a lot of our stains were). Left it alone for about 24 hours.

That took a LOT of it off, and I was able to then scrub the rest of it off with a cleaner. You can use a pumice stone too