Hold the brush side facing down and press down the button. Turn the pen upside down, holding the dispenser side above the nail. This will prevent the brush from getting stuck and ensure smooth pour. You can control the speed of the stream by holding the button fully and half pressed.
Apply dipping powder base to your nails and position your finger over the tray. Dispense the powder onto the nail, wait a few seconds for the base to set, and then dust off the powder with the brush on the other side of the pen.