Does Vaping Weed Smell? (More Terpenes = Stronger Smell) Can they tell if you vape in a hotel room? Knowledge Kaiweili Digital Technology Even after a cigarette or vape is put out, toxic chemicals don't just disappear. They cling to furniture, carpets, walls, clothing, everything it touches. This residue is called thirdhand smoke. And it How to Detect if Someone is Vaping in Your Home: Key Signs to Watch