The one time i tried crack it wasnt succesful for me either. I used a glass rose and chore boy. I bought a couple nicks of rock from an open air market in my city and they were about a little smaller than a pinky nail each. I heard youre suppose to "pre melt" it before hitting it, so I put the chore as far as possible to the end to have the rock sort of outside of the glass so the lighter could get to it, put the lighter on it and it wouldnt even melt. The way i got it to "work" was pushing the chore back down then putting the peice of rock in the pipe and heating the rock from underneath the glass, i heard it do the "crack sizzle" and turn into liquid and i kept hitting that, but it just ran right past the chore boy, maybe it wasnt tight enough? As far as the high i got, there was none, so idk if it wasnt good crack or my technique was shitty. I felt more "buzzed" from inhaling the copper smoke off the chore boy unfortunately, since no matter how long i held a flame to that shit the copper would never stop smoking and id feel the harsh smoke when trying to hit the crack liquid running down my pipe. It also turned the pipe pitch black after a couple hits...sigh.