It's an unfortunate fact that for many people their first experience of a foreign land is an airport toilet. And it's not always a pleasant one.
You know what I mean. By the end of a flight the toilets in the plane are often just a little ... squiffy. So you save yourself for a toilet on the ground. And sometimes you wish you hadn't.
In airports like Singapore and Hong Kong the toilets usually look as though they were cleaned five minutes before. But at other airports - Sydney, Kota Kinabalu, Paris and Heathrow are examples that spring to mind - you could get the impression that the cleaners had taken the week off.
The result can rather undermine the jolly signs proclaiming "Welcome to ..."
Happily, our own main entrance, Auckland International Airport, rates pretty well in my experience. And the airport's toilet cleaning system has just been given star billing by New York Times Pulitzer prize-winning columnist Thomas L Friedman.