Objective: How do you use a hot glue gun?

Which of the following solutions is more sound in terms of naive physics reasoning?

Choose from:
1). Plug in the hot glue gun and let it warm up. Insert a glue stick into the gun and push the glue into the heated element as you go.
2). Plug in the hot glue gun and let it warm up. Insert a solder wire into the gun and push the wire into the heated element as you go.
1).