Due to the fear that harmful bacteria may enter the human body from the mouth, medical experts warned that electronic cigarette users may have health problems if they do not clean the electronic cigarette equipment correctly.
Suzi gage, a university scholar who studies recreational drug use, said that humidity associated with inhalation of steam may harbor bacteria. She suggested that if the electronic cigarette or the exhaust funnel is not cleaned regularly enough, it may cause the user to get sick.
Little is known about the health risks of nicotine, gage said. "We know what harm tobacco does to health. It's tar, carbon monoxide, formaldehyde, heavy metals and dozens or even hundreds of carcinogens in tobacco," she said.
"These things either don't exist in e-cigarettes, they don't contain tobacco in themselves, or they may exist, but the order of magnitude is lower than cigarettes. Now that doesn't mean that e-cigarettes are harmless, because breathing in heated steam can have other risks that we don't know.
"Moisture associated with steam, for example, may harbor bacteria, especially when these devices are reused rather than being used once as cigarettes. If you are an e-cigarette user, you can think about how often you clean the straw you put in your mouth. "