You'll want to scrub these germ hideaways immediately.

Your house is hiding a dirty little secret. While you know to disinfect doorknobs and change toothbrushes regularly to avoid spreading germs, the kitchen is a hotbed for bacteria you might not expect. A study of 30 “high touch” locations in 17 homes revealed that the kitchen contained the highest number of bacteria in a house, and sponges were the most contaminated item of all.

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While not all bacteria are harmful—for instance, probiotics can help maintain good gut health—salmonella, E. coli, listeria, yeast, and mold are kinds commonly found in kitchens that may cause sickness. According to the study, yeast and mold were found on all 14 kitchen items tested, including rubber spatulas and refrigerator ice dispensers. A scary 36% of kitchen items were found to have E. coli and salmonella.

The good news: Regularly cleaning your kitchen with hot water and soap can help prevent the spread of bacteria. Here are the shockingly dirty spots in your kitchen to know, so you can keep your home germ-free and your family healthy: