How Long Does Vape Smoke Linger in the Air? Secondhand vape exposure: Risks and side effects Whats in your vape? Maybe a dash of m*th or t*c? For us here at The John Hill Show we only vape pure NOTHINGNESS. Air, even. We advocate for non stimulating, natural only, balls deep wellness from The safest vape is the one you never start. Flavoured vapes were designed to feel harmless: Candy taste. Fruit smell. Cool packaging. Viral aesthetics. But your lungs don't care about the flavour.