Pink mold in your shower? What it is and how to get rid of it

Ever notice a slimy pink or reddish film on your shower walls and grout lines? This sticky substance — often called pink mold — is usually found in warm, moist environments that lack proper ventilation, like bathrooms.

What is pink mold?

First, pink mold is not mold, even though that's what many people call it. It's a combination of unsightly microbes. "It's a type of waterborne bacteria called Serratia marcescens," said Eliana Coca, owner of E.C. House Cleaning. "It thrives in moist environments and feeds on fatty substances like soap scum and shampoo residue, making bathrooms a common battleground."

Pink mold is unlikely to harm most healthy people. "It's a mix of very common microbes that are generally in everyone's home at all times," said Nick Valentino, vice president of market operations at Bellhop Atlanta Movers.

However, it could cause an infection if it gets into eyes or open wounds. This is a particular concern for small children and people who are immunocompromised.

Pink mold causes

Pink mold grows quickly under the right conditions, including damp and warm places filled with organic material, said Coca, making bathtubs and showers easy targets. The bacterial colony thrives on wet surfaces, like tile grout, silicone seals, shower tile walls, and shower curtains. The sticky stuff also likes organic matter that offers nutrients to help the bacteria thrive, like soap scum, shampoo residue, dead skin cells, and body oils. "What leads to those pink, slimy colonies is an excess of moisture and a lack of regular cleaning," says Valentino.

How to remove pink mold from the shower

Getting rid of pink mold starts with a good cleaning. To begin, Coca advises that the bathroom should be well-ventilated and that anyone tackling this yucky stuff wear gloves. "Cleaning practices to effectively remove pink mold include using a solution of one part vinegar to one part water, or for more stubborn cases, a bleach-based bathroom cleaner," she says.

After creating the cleaning solution, scrub the surface with a scrub brush, sponge, or scrubbing pad. "Removing a well-established colony of pink mold is a matter of being thorough and persistent," says Valentino. He recommends starting with a baking soda solution to remove most of the material, followed by repeatedly targeting the area with bleach.

Be sure to rinse the area when you're finished. While it could take more than one cleaning to do the trick, frequent cleaning is necessary to prevent it from coming back.

How to prevent pink mold

"The best way to keep pink mold in check is to regularly clean your tub or shower with a bleach solution at least once weekly, and to make sure your bathroom is adequately ventilated," Valentino advised.

Coca added: "Regularly cleaning and drying shower walls and floors are crucial because Serratia marcescens can quickly colonize when there's enough moisture and organic material to feed on." She noted that a mold-free shower means regularly wiping down surfaces to prevent soap scum build-up and ensuring the area is completely dry.

Proper ventilation keeps dampness and moisture levels under control. "If you have an exhaust fan, make sure you run it for several minutes after every bath or shower," said Valentino.

Open windows and doors after your shower or bath to ensure any moisture dissipates. To prevent pink mold from returning, Coca recommended drying towels, shower curtains, rugs, mats, sponges and washcloths after every use.

Don't panic if you find pink mold

Pink mold is common, typically harmless and easily treatable with household cleaners and some elbow grease.