Which one was developed first?
When you first inject a fresh dose of butane into the tank, your lighter immediately freezes. This happens because the butane is very cold when it’s transferred from the canister to your lighter. Wait for a few minutes for your lighter to warm back up before igniting it, or you will get an inconsistent flame. Hold the lighter in your hand or put it in your pocket for five to ten minutes until the cooling sensation wears off. When your lighter feels like it’s at room temperature, ignite the flame.
Hope that helps