Step 3: Preparing your heating core.
Break open your soldering iron.
This will vary based on the model of soldering iron you use. On mine there was a metal tube which holds up the tip and heating core. I opened this up by prying at the seem using needle nosed pliers. The handle need to then be cut open. Remove the little grip piece first. I sawed perpendicular to the handle. This meant that I needed to cut the wires to the soldering iron in order to remove the heating core. This increases how much of a fire hazard your vaporizer will be. You could alternately cut parallel to direction of the handle and then pry it open. This wouldn't require you to cut the cord to the soldering iron core, but it may be more difficult.
Tape up the soldering iron leads. The core, as you can see, is a core with two wires running off of it, these wires then hook to the plug cord. There's exposed wire where the two woven leads meet the plug cord. This is to save radio shack some money (that's what that little yellow thing in the iron was for). Don't worry about the specifics of the iron, just make sure that before you plug anything in you've put electrical tape over any exposed wires. If you cut your iron cord, fix it up now. Solder it, or use the twisty caps, and then make sure you put some electrical tape over it!