At the sink she scrubbed her hands repeatedly with coarse brown soap. How can the hands be clean if the soap is not? This question was insistent in her life. But if you clean the soap with bleach, what do you clean the bleach bottle with? If you use scouring powder on the bleach bottle, how do you clean the box of Ajax? Germs have personalities. Different objects harbor threats of various insidious types. And the questions turn inward forever.