Sitting somewhere when a cloud of cotton candy vapor washes over you? If you can smell the sweet scent of a vape, that's not a great sign. https: www.wowktv.com national news does vaping cause secondhand smoke doctors explain the side effects If someone smokes outside, do they bring thirdhand smoke indoors with them? Thirdhand Smoke Resource Center How to Tell if Someone is Vaping in Your House: Hidden Signs Vapers & Hookah Smokers Exhale Through Nose More Often Than Cigarette Smokers NYU Langone News Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center