Not great for hard water

I have hard water and really have to scrub due to calcium and lime buildup. These get most of it but not all and fall apart to quickly to get a good scrub. I’m afraid I’ll scratch the porcelain with the handle. I’ll use until they are gone but am not sure I’d buy again. I love that they can be flushed and the handle just rinsed and put away. If the chemical cleaning agent were better for my needs, I’d never go back to a regular toilet bowl brush

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