If you spot some mold growing on your shower curtain or door, you're surely grossed out enough to do something about it-and fast. But if you're like most people, you rarely stop to wonder about the bacteria in your shower that you can't see.

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Ceudy Gutierrez reads a book to her 2-year-old son, Matias, at their home in Buford, GA, on Tuesday, Nov. 18, 2025. Ceudy Gutierrez is struggling to make ends meet for herself and her three young kids following her husband’s ICE arrest earlier this fall. (Miguel Martinez/ AJC)

Credit: Miguel Martinez-Jimenez