1. Make sure you are turning them the right direction and using the proper tool to remove them.
  2. If you have a PCC2000, Vantage, Vanquish, Vanish, Vector system where the nozzle(s) won’t come out it is recommended that you go to a hardware store and buy a nozzle that fits on the garden hose that looks like the end of a fire hose. Then swim down or tape the hose to the pool and blow all around the nozzle into the tool slots to clean that area.  Then use the tool to try to remove it Clockwise.
  3. Sometimes nozzles are in a body that is deformed from being installed with the wrong glue. If you can get it to turn ¼ of the way, then you may be able to pry it out. DO NOT DO THIS UNLESS THE NOZZLE TURNS ¼ OF THE WAY TO UNLOCK IT!