I have a 50W electric iron, a few days ago for a few times, and took in the file on a few, the surface of the black down, and let the iron (hot) with rosin, soon after, very good use, and dark, and I took a few (light), bright after use, can cut off the tip of solder wire, but not only for melting solder, soldering iron head solder melt a little bit later. What's the matter? What's the solution? Do you change the soldering iron head? Which one is best if you want to change?
Add a tin of OK, and when not in use, the soldering iron also adds tin to clean the soldering iron head. The next time you use it, there will be no black objects, and it will be much easier to use.
The tip of the pointed iron can not be filed with a protective layer. Only the new ones!
The electric iron is plated with a layer of metal on top of it. It can not be pulled down by a cutting knife. If the electric iron is dirty, it can be pulled on the soaked sponge. It is as smooth as new
