Q: The marble threshold for my shower has reddish marks. How can I remove them? Annapolis, Md. A: Marble can develop reddish marks for a variety of reasons, such as spilled red wine, bacteria or ...

I’ll admit it. I’m not the best housekeeper and I’m frazzled. My tile shower floor is filthy with hard water stains. I don’t like using harsh chemicals for a number of reasons, and because the stains ...