1. Unscrew the foam sleeve on the handle, open the counter with tools, and slowly cut along the interface with wallpaper knife.
2. Gently open the timer and take out the counter and the scattered parts inside. Reset the dropped parts and install the paddle that drives the counter to rotate.
3. Put the parts away, and finally close the shell, and pay attention to adjust the position by putting the zero button through the hole on the panel.
I hope the above information is helpful to you. If the jump cabinet is still under warranty, it is recommended to contact the merchant for maintenance.