How to clean toilet?

I use Iron Out, it works wonders

for My toilets I leave Clorox to soak overnight then the next day I pour coke cola and a pumice stone on its all clean

I use a product call “the Works” and I get it at dollar general. They have a formula for toilets and also for showers. It is absolutely amazing and cheap. I put it in a spray bottle for the shower.

A water softener will help protect all of your pipes and fixtures.

The above answers are good options but if you have the red/brown stain from iron I love “bar keepers friend”. Inexpensive powder that you need to scrub but it eats the iron the best for me.

ZEP acidic toilet cleaner works best for me. Use a little, let sit 5 minutes and clean as usual. Can be bought at Tractor Supply.

I use "The Works' and it is amazing at remove hard water, rust stains and lime build-up.

Did you try denture cleaning tablets?

Here's a post that might help - https://chascrazycreations.com/how-to-clean-your-toilet-from-top-to-bottom/