The use and maintenance of soldering iron tip
In order to prevent more oxidation when the soldering iron tip is in use, it needs maintenance:
1. Wipe the used tip of the soldering iron on a wet sponge
2. Adjust the soldering iron to about 250°
3. Add tin to the surface of the soldering iron tip evenly, subject to no dripping
4. Adjust the temperature to the lowest or turn off the soldering iron and put it back on the soldering iron stand
