As the Long Read turns 10 we are raiding the archives to bring you a favourite piece from each year since 2014, with new introductions from the authors. This week from 2019: For a century, the humble paper towel has dominated public toilets. But a new generation of hand dryers has sparked a war for loo supremacy. By Samanth Subramanian. Help support our independent journalism at theguardian.com/longreadpod