Things You'll Need
Instructions
Weave thin copper wire through the holes at the end of your lighter. Go through each hole once; you want enough copper exposed to the flame so it turns green but not too much so that there is no room for air to get in and feed the flame. If your lighter does not have holes at the end, look for places where you can tie copper wire so that one or two strands of wire hang over where the flame comes out.
Tie off the ends of the wire and cut away excess material with wire cutters.
Ignite the lighter. Initially the fire may still burn red, but as the copper heats up it will eventually turn the fire green.