Tom Brokaw didn’t mention it. It wasn’t on Time magazine’s list of the most significant events of the twentieth century. But at least once every millennium, there ought to be a serious discussion about dirt. It has always been around, and as society has progressed, so has the nature of the dirt that surrounds us.

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When you think of the word “clean,” you might picture a sparkling kitchen counter. But in a hospital operating room, “clean” is a term of microscopic precision, where the stakes are infinitely higher. For the highly trained Environmental Services (EVS) technicians responsible for this environment, cleaning is not about tidiness—it is a critical, non-negotiable component of patient safety.

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