Probably the best way is to have a switch on one of the terminals to turn the heating element on and off, but I found it wasn't necessary since it worked so quickly
Smoking kills, with or without a filter
In reality, however, the physiologic threat is that nicotine affects mood, creates dependence, and causes withdrawal symptoms during cessation attempts
Chem Res Toxicol 14:611650 Jalas J, Hecht SS, Murphy SE (2005) Cytochrome P 450 2A enzymes as catalysts of metabolism of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK), a tobacco-specific carcinogen
While e-cigarette vapor does include some of the same chemicals found in cigarette smoke, the levels of these chemicals are many-fold lower than found in cigarette smoke.21,22 So while e-cigarettes are not 100% safe, the risks are surely far lower than the alternative of inhaling cigarette smoke.23-25 It is also worth noting that several studies have found that smokers who switched from cigarettes to an e-cigarette had significantly improved lung function and lower risk of airway infection, which would be clinically important for someone with lung cancer.26-30 Fourth, many smokers prefer e-cigarettes over other aids to quitting
Heated tobacco products are largely subject to similar strict regulation of cigarettes