The Mica Mist spray could become blocked with mica powder if not shaken enough, as mica settles to the bottom of the bottle and blocks the tube. You can remove the nozzle from the bottle, along with the little 'straw' from the cap, clearing the cap by soaking it in hot water seeing if there is any blocking of the nozzle, this can also be carried out by clearing it with a pin. If this does not resolve the issue please feel free to email us at firstname.lastname@example.org and we'll do our best to help,
To stop this from happening, after each use (end of the day) the lid is removed and the tube is placed in a bowl of water and water is pumped through. cleaning water through the mica mists stops them from blocking.