Beyond ensuring there is plenty of juice in the wick of your coil there should be no "Break in" required, Start with your temp set around 420f and your joules around 50, This should produce a reasonably warm comfortable vape, if it's cold and weak, check to see if you're getting the "Temp Protected" message - if you are check your wicking, TC Needs lots of juice at the wick to work correctly. If you dont get the "Temp protected" message and your mod continues to fire at full power then you'll need to increase the joules or decrease the airflow as the coil is cooling down too quickly. Don't forget the coil MUST be at room temp when you connect it to the mod and you should register the initial starting resistance according to the instructions with your device...