Oh hey I think your sister hired the same cleaning person I did. She scratched all my bathroom faucets and when I brought it to her attention she said it’s bc I had so many hard water stains she had to scrub hard. Like how does anyone think damaging it is better than saying I can’t get these out? Also she didn’t fully get them out, and I’ve always been able to so I think it was also another case of not even trying to let a cleaner (or vinegar!) sit for a bit to help dissolve it. (This apartment does have really hard water - it builds up super fast in hot water kettles and humidifiers too)