Unplug your vape when it's fully charged to reduce the risk of fire. Rechargeable vapes contain batteries which can overheat when left charging for too long and that means fire risk. Secondhand smoke and secondhand aerosol Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times Surface Detection of THC Attributable to Vaporizer Use in the Indoor Environment Scientific Reports Talking with teens about vaping: A tip sheet for teachers Canada.ca E cigarettes and Vaping Commercial Tobacco Use MN Dept. of Health