Notes on soldering iron

Avoid long-term empty burning: it will cause oxidation of the soldering iron tip and affect the welding quality.
Do not press the soldering iron tip hard: when welding, just let the heat transfer, no need to press hard, otherwise it is easy to damage the circuit board.
Maintain good ventilation: welding will produce smoke, so it is recommended to do it in a well-ventilated place or use a welding smoke extraction device.
Prevent burns: the temperature of the electric soldering iron is as high as hundreds of degrees; avoid touching the soldering iron tip or the heated part.