Don't Let Dirty Dishes Pile Up—Your Health Might Depend On It

Ever wondered why some people insist on leaving a clean sink before going to bed, or prefer to keep it empty throughout most of the day? They might be onto something important. Recent studies suggest that a sink filled with dishes could put your health at risk.

According to these studies, if you’ve been dealing with a persistent cough or cold, or unexpected ear infections, there may be a reason. “Drains can clog with gunk, which can damage your plumbing and also make you feel unwell,” a health expert told Bristol Live. The site also cited a study from the University of East Anglia, which described sinks as “alarming reservoirs for bacteria that can spread disease.”

Experts point to the buildup of hair and debris in drains, which creates a bacteria-laden biofilm. This biofilm not only produces unpleasant odors but can also pose health risks, potentially leading to infections such as listeria and salmonella. Research indicates that sinks used as catchalls for food scraps—especially from raw meat—can create additional health hazards. Microbiologist Kelly Reynolds recently noted that “this biofilm might even contaminate your food or dishes.”

Experts also warn that bathroom sinks and showers can harbor bacteria. Sulfates from products like shampoo, silicone from gel or conditioner, and other toiletries can mix with grime and cause blockages.

So what can you do? First, it’s recommended to clean the sink by hand regularly or promptly load dishes into the dishwasher. You can scrub the sink with baking soda and make sure to disinfect the faucet handles and surrounding surfaces. If the sink fills with food residue, dispose of it in the trash immediately—otherwise, bacteria can accumulate and potentially cause illness.