Are you using an excess bit of the steel scouring pad? Please try and use only as much as needed to soak up the DMT! (If any drips through when melting, you used to little)
Also, please keep in mind that you need to heat the machine pretty immensely! Between tokes it will cool down, and it can take a couple of seconds before you reach enough heat to vaporize it again. This is where torch lighters come into the picture. These lighters get very hot and have a directed flame. This means that you don't have to waste any lungspace with air, you simply heat the scouring pad until you see DMT-dust forming. Then keep on heating and gently turn the machine while you inhale slowly (don't rush it!). Lucky vaporizing!
There's a clear difference between what I say I do and what I actually do perform.