there might be a bunch of people on here that will disagree with me, but I just went to the DI (equivalent of goodwill elsewhere, except its better), and bought a used iron with a dial on it, and you can just use that instead. just make sure you have a temperature where it will melt the wax, but wont burn it (if you see smoke, you're burning it). i just made a mark on the dial of my cheap iron i bought where it seems to be the right temperature, and turn it to that each time, and adjust accordingly