What Happens When You Quit Smoking & Start Vaping Vapourcore PSA: Vaping indoors doesnt just vanish into thin air it leaves behind a sticky, oily residue that builds up on windows. If your glass looks hazy no matter how much you clean it, this might be why Vaping releases toxic chemicals, including heavy metals, as well as ultrafine particles that go deep into the lungs. These increase the risk of heart and lung disorders. Residue left by vapes can pose health risk to young children