Smoke comes from the hair or from the appliance during use.
You are using the appliance at a temperature setting that is too high for your hair type.
=> Always use the appliance at a temperature setting that is suitable for your hair type. See 'Using the appliance' chapter in the user manual.
The air contains more moisture in some climates and surroundings than in others. The heat of the straightener/curler causes moisture that is naturally present in the surrounding air to evaporate.
=> This is normal and harmless. Be sure to use a temperature setting that is suitable for your hair type.