I burned the wart on my forearm 30 years ago with the tip of my cigarette. I burnt it to the root on the spot. Unfortunately, I carry a light scar today. I think using a soldering iron may be better but I do not recommend this to anyone. Ask a doctor or a surgeon to do it for you because it plain works.
Hot Cigarette Tip
I had like 3 - 4 warts on my palm for over one year and it was annoying. I've heard about applying hot temperature to the tip of warts. I've tried a few times but it didn't help. One day I was really aggrevated, so I used really hot tip of ciggaret (red hot tip) and kept touching the warts until I've count till 10. (slowly) And I guess that was the secret. The really hot temperature was supposed to be applied long enough to kill the root of the wart. It was pretty painfull , and actually nothing changed. I forget about it, and one day I was in the bath for like 30 min. The skin was soft and I started to wipe my hands with a towel. To my surprize all of my warts started to come off with the piece of skin. And I saw whole warts, with the roots. My hand was clean. The point was to overcome the pain of the heat long enough and kill the warts by heat. I do not know if this method involved risk, so please consult a doctor before trying it.