You may be familiar with the unpleasant stains smoking leaves behind. Smoking too much can lead to your teeth turning yellow. If you smoke inside, your furniture and walls will soak up the odor and yellowish color of the tar produced by cigarette smoke. Vaping, on the other hand, does not produce tar. There is no nasty byproduct to worry about staining your home or your mouth. Vapor is simply a gas form of a liquid. If it condenses again, it can form a thin layer of moisture on a surface, but that moisture can be wiped away with a clean cloth, leaving nothing behind. You can vape freely indoors and outdoors without worrying about your friends and family smelling it in your home months or even years later.