Here’s a pic of one of my nozzle. It’s a Railbird 12-Van with a blue filter (if any of that matters). It’s set to shoot out over ~180 degrees. You can clearly see some water does not shoot out on the top right, while water does come out on both sides of it. Also, some water does shoot straight up close to the screw on the top. I’m assuming this nozzle needs replacing? I have unscrewed it and tried my best to remove any debris in there.