The light on my JUUL flashes rainbow colors? Remove the JUULpod and reinsert it to reset the device. If you continue to have problems, please contact the JUUL Care team. Related articles The light on my JUUL blinks from purple to red? The light on my Limited edition JUUL device blinks blue 5 times? My JUULpod is leaking when I use it? My JUUL lights up and creates vapour when I am not using it? My JUUL is not producing vapour.