What causes orange stains on shower curtain and sink mats?

Orange stains on shower curtains and sink mats are often caused by a type of bacteria called Serratia marcescens. This bacterium is commonly found in moist environments, such as bathrooms, and can thrive in the warm, humid conditions of a shower or sink. Serratia marcescens produces a pigment called prodigiosin, which is what gives it its orange color.

Serratia marcescens is not typically harmful to humans, but it can cause infections in people with weakened immune systems. It can also cause allergic reactions in some people. If you notice orange stains on your shower curtain or sink mat, it is important to clean them promptly to prevent the bacteria from spreading.

To clean orange stains from a shower curtain or sink mat, you can use a variety of household cleaners, such as bleach, vinegar, or baking soda. Be sure to follow the directions on the cleaner label carefully. You may also want to wear gloves and eye protection when cleaning to avoid contact with the cleaner.

Once you have cleaned the stains, it is important to dry the shower curtain or sink mat thoroughly to prevent the bacteria from growing again. You can also spray the shower curtain or sink mat with a disinfectant to help kill any remaining bacteria.

If you continue to have problems with orange stains on your shower curtain or sink mat, you may want to consider replacing them.