Using this Hakko soldering tip is easy. First, make sure your FX - 888 soldering iron is turned off and cooled down. Then, swap the old tip with the new T18 - D16 screwdriver tip in just 30 seconds. Once the tip is in place, turn on the iron and set it to the appropriate temperature for your lead or lead - free solder. When soldering, hold the iron at a comfortable angle and apply the solder to the joint. Be careful not to touch the hot tip with your fingers. After use, turn off the iron and let it cool down. To maintain the tip, clean it regularly with a damp sponge. This will keep it in good condition and ensure long - lasting performance.