I usually smoke alone. But I was with my friend the other day, rolling our bowls together. And he says I waste too much of it. I do waste a bit, I know, but I do that on purpose. When I start heating the bowl, I roll it back and forth, it starts smoking a bit, I'll heat a little more, then before I toke it, I'll blow out a little first. Two reasons I do this. First, to clear that stale smoke in the bowl. I find it hurts my throat and makes me cough if I inhale it. Second, to make sure it's vaporizing good enough to hit properly. If when I blow, it doesn't start creaming, then it's not ready yet. Anyway, my buddy says he hits it as soon as it's smoking and never blows the stale smoke out. Maybe that's why he coughs after every hit? What do you do? Personally, I don't mind "wasting" that little bit, to ensure that I get a nice smooth hit.