| Tip life TOP | |
| Point 1 | Solder corrodes the iron-plated part and makes a hole. |
| Point 2 | The solder-plated part is oxidized in black and the tip is no longer wet with solder. |
| Point 3 | The surface of the heating element insertion part oxidizes and the heat conduction becomes poor. (*Except for tips in composite type which has different structure) |
Point 3. The surface of the heating element insertion part oxidizes and the heat conduction becomes poor. (*Except for tips in composite type which has different structure)
*If the tip, tip enclosure(pipe) and heating element are oxidized completely, they should be replaced with new ones.