My 10-year-old daughter used to go straight to the bathroom as soon as she got home from school. When I asked her, “Why do you always take a bath right away?” she smiled and replied, “I just like being clean.” But one afternoon, while cleaning the drain, I discovered something that made my whole body shake, and I took immediate action. My 10-year-old daughter, Sophie, has been following exactly the same pattern for months: as soon as she gets home from school, her backpack falls to the floor…