Few years ago, I found out that I've been cleaning my home all wrong. I was in a hotel room, when a maid came in and sprayed a solution on every surface...and then left. Right when I thought she'd forgotten, she returned. She wiped for less than two minutes with a thin dry cloth, and the whole place sparkled. It had, frankly, never occurred to me to let one solution do all the work, so I asked her what she'd used. It was something...