19 - Pet Food Bowl - The inside rim alone contains 2,110 bacteria per square inch.

20 - Money - Bank notes can have up to 200,000 bacteria. It's a good idea to wash your hands after directly handling cash.

21 - Handbag - Notoriously dirty, they usually contain your phone, money, and other things that after reading this list should give you an idea of why you want to clean your handbag.

22 - Kitchen Sponges - In nearly every part of the world this is notoriously the dirtiest thing in the house. With 10 million bacteria per square inch your kitchen sponge is nearly a quarter of a million times dirtier than your toilet seat. Having absorbed the fecal matter of everything from humans to cows as well as a multitude of other much more terrifying bacteria we would highly recommend that you change your sponge...like right now.

23 - So How is the Toilet so Clean? - It's pretty simple really...we actually clean the toilet. Because we generally think of the toilet as being dirty we clean it with all sorts of chemicals. Toothbrushes, kitchen sponges, and cell phones on the other hand are cleaned rarely, if at all.

24 - Draperies - Magnets for pet fur, mold, dander, debris, and dust mites, these things just sit there unsuspectingly soaking it all up.

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