Do Vapes Smell? How Strong It Is and How Long It Lasts What Does a Vape Smell Like? 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. Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center How Long Can You Smell Vape Smoke On Someone How Long Does Vape Smell Last? Tips to Reduce Odour