Juul built an e-cigarette empire. Its popularity with teens threatens its future
A phone beeps. Someone's vaping in the bathroom again. Detectors scan Plainedge High School's most popular girls' and boys' bathroom for chemical changes in the air that signal someone's vaping. When it senses a change, it alerts administrators. The Massapequa, New York district decided to install the detectors to help control a surge in students using e-cigarettes.