Place a vape detector near vents

https://markets.businessinsider.com/news/stocks/zeptive-releases-update-1-33-500-for-vape-detectors-adds-enhanced-detection-performance-loitering-monitoring-and-integrations-with-bosch-milestone-i-pro-and-digital-watchdog-1036055200

Place a vape detector near vents and mirrors to catch aerosol plumes that may otherwise disperse rapidly in hectic restrooms or corridors.