Think before you flush or brush

One of my friends from high school has made a habit of putting toilet seat lids down before she flushes. She started doing this about four years ago when she heard that when toilets are flushed, water droplets are expelled from the toilet bowl into the air, and when they land, other areas of the bathroom get "contaminated" by toilet water. That always amused me, but when I went over to her house, I humored her and followed this personal rule of hers. However, I didn't know—and chances are, she didn't know—just how justified she was in worrying about in what is known as the "aerosol effect" in toilets.

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