1. First, prepare a Picasso 606 pen with the nib removed, as shown in the figure below:

2. Then you can press the pen head of Picasso's 606 pen with the pen cover, and then shake the pen body, as shown in the following figure:

3. Press the pen tip on the other side with the pen cap and shake the pen body, as shown in the following figure:

4. So the pen tip of Picasso 606 can be disassembled, as shown in the following figure: