October 30, 2026, 1:02 pm | Read time: 4 minutes

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These 5 Items Are Dirtier Than the Toilet

The bathroom is often suspected to be a haven for bacteria and germs of all kinds. People use the toilet, shower, and wash off dust and dirt particles there. This often leads to the assumption that this room needs to be cleaned more thoroughly than others. Moisture and warmth generally provide an ideal breeding ground for germs. But is that really the case? Elke Messerschmidt from the Competence Center for Home Economics cites the toilet seat as an example: “The fear of germs on toilet seats is present and significant in our perception. But there are fewer germs on the toilet seat than expected: According to a study by the University of Arizona, there are 50 bacterial strains per square centimeter.” That may sound like a lot, but compared to other items, it’s not. Especially in the kitchen, you’ll find significantly more germ hotspots.

Cutting Board, Kitchen Sponges, and Dish Towels

It’s not surprising that many bacteria thrive in the kitchen, given food scraps and the like. In fact, the kitchen is the place in the home that hosts numerous germ hotspots. Some of these are even far more contaminated with germs than a toilet. Elke Messerschmidt says: “You’ll find 200 times more germs on a cutting board, 20,000 times more on a dish towel, and 200,000 times more on a sponge.”

Indeed, the sponge is one of the biggest germ hotspots in the home. That’s why the kitchen sponge should be replaced daily.

Also interesting: Leaving a dish towel out after washing? A microbiologist advises

The Refrigerator

The refrigerator is one of the most germ-laden items in the household. It harbors significantly more bacteria than a toilet—approximately 11 million germs per square centimeter. Despite being cool, which is generally unsuitable for bacterial growth, food residues and moist air allow bacteria to settle and even adapt to the temperatures. Cleaning the refrigerator only when defrosting it makes little sense.

Instead, it should be thoroughly cleaned with warm water and vinegar every one to two weeks to prevent germ accumulation.

The Compost Bin

In many households, it’s a staple of the waste system: the bin where compostable waste is collected. From banana peels to soup leftovers or just small crumbs—the compost bin contains everything that provides a perfect breeding ground for bacteria. It’s warm inside, and the air often becomes stagnant with rotting food scraps or fruits, making this item one of the most popular germ hotspots in the home. Up to 5 million germ spores can be found there.

To tackle the bacteria in the compost bin, you should not only change the trash bags regularly but also rinse the bin thoroughly with hot water and disinfect it after each emptying.

Also interesting: Why you should never dispose of cooking oil down the drain

How Much Should You Worry About Germs?

All these numbers may sound alarming, but Prof. Dr. Dr. Andreas Podbielski, microbiologist and specialist in hygiene and infection topics from the MVZ in Rostock, adds that it often depends on the environment where you encounter dirt and germs. “In your own home, the dirt primarily comes from yourself, and whether it’s a dish towel or toilet, the germs have already passed over or through your body before landing on the items. Moreover, these germs are still on and in us, likely in much larger quantities than on the examined item. As long as you’re healthy, these germs obviously don’t harm you.”

Thorough cleaning is still important and may bring individual requirements for certain items. However, Prof. Dr. Dr. Podbielski advises against falling into a cleaning panic. “From a hygienic and infection perspective, a healthy balance of regular cleaning actions is sufficient in Central Europe, paired with special actions that may need to be performed frequently (up to disinfection) when the risk is noticeably high (e.g., sick individuals in the household).”