Toothbrush holder

Photo: amanaimagesRF/Thinkstock

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The Bathroom Germ Catcher
The benign-seeming toothbrush holder is one of the dirtiest items in the house: The average holder is crawling with more than 2 million cells of bacteria. If yours is made from brushed stainless steel or plastic, you can put it in the dishwasher (once, or even twice, a week is ideal). But don't put your toothbrush in; the ADA says the machine could damage it and make it less effective.