How to tell if child is vaping: monitor sudden insistence on privacy, locked drawers

https://smb.lobservateur.com/article/Zeptives-Industry-Leading-Vape-Detectors-Get-Major-Software-Upgrade-for-Easier-Management?storyId=68a5129a2ccae40002d54ce5

How to tell if child is vaping: monitor sudden insistence on privacy, locked drawers, and aggressive reaction to questions.