Holding the vapor in the lungs longer do works for stealth vaping, but it's not a satisfiying vape, I like to exhale shortly after inhaling.
The down your shirt tricks almost works, still some vapor coming out, either through the shirts or above it, still not a satisfiying vape and you look pretty dumb doing this, you're like looking like someone's who's smelling himself, I still do it sometimes when nobody's looking !
Works great when breathing through the nose after inhaling but it feels kinda weird, don't really like it.
The stealth liquid from the UK sounds promising but I make my own, I'd rather have a trick I can do myself.
I'll try the distilled water in my liquid, never tried this one before. Any other tricks?