It's a pumice stone on a stick (because it'll cut up your fingers). Otherwise you need toilet bowl cleaner, which is just a bleach gel that clings to the inside of the bowl, and a brush. These two things should get your toilet back to white or keep it white.
I like to use The Works brand bleach tablets in the tank. Your toilet will have a bleach smell all the time but it does a great job of keeping the mineral buildup and stains away. They work so much better than Clorox brand or any others.
If you have a lot of mineral buildup then you need one of these:
https://www.amazon.com/Remover-Removes-Unsightly-Toilets-Porcelain/dp/B000BPRDCW
It's a pumice stone on a stick (because it'll cut up your fingers). Otherwise you need toilet bowl cleaner, which is just a bleach gel that clings to the inside of the bowl, and a brush. These two things should get your toilet back to white or keep it white.
I like to use The Works brand bleach tablets in the tank. Your toilet will have a bleach smell all the time but it does a great job of keeping the mineral buildup and stains away. They work so much better than Clorox brand or any others.