I prefer to use a butane torch over a BIC lighter to torch my resistance wire. If you use a BIC you need to make sure that the flame is not directly touching the wire or it will leave behind black carbon precipitate (the carbon in the butane cannot burn unless it joins with oxygen, so if you interrupt the flame the unburned carbon will precipitate). Using a butane torch alleviates the problem of carbon precipitate because it will introduce a 30% oxygen mixture before ignition, resulting in a much more efficient burn that doesn't leave anything behind. The whole point of torching your Kanthal is to burn off hand grease, machine oil, and other impurities. Coating your resistance wire with black carbon precipitate kind of defeats the purpose. Although more expensive than a BIC, you can get a decent butane torch for under $20.