Among the many inventions I’m grateful to have enjoyed during my lifetime, high on the list would be the dishwasher.  Penicillin is my #1 invention, because without it I would have been dead at 15 months old! I bought my first dishwasher when I was thirty-two, and really fed up with washing dishes.  No one I knew had a dishwasher when I was growing up in Britain. Even the rich people I worked for (as a nanny, cleaner, general dogsbody) didn’t have a dishwasher. Dishwashers were “one of those American things.”  In fact, from the time I could...