By Tanner Garrity Microbiologists confirmed a few years ago that the kitchen sink is the dirtiest place in the house — dirtier, even, than the seat of your toilet. When scrubbing it free of all sorts of bacteria (salmonella, E. coli, yeast, fecal matter, other nasty nonsense), you’re best served mixing a bleach solution with water and using one of those durable, nylon-bristle scrub brushes. What you almost certainly shouldn’tuse is an old-fashioned kitchen sponge. According to a study published in Nature Chemical Biology, the architecture of sponges offers an unmatched breeding ground for micr…