Pressure first
Spray nozzles are built for a pressure range. Above that range they atomize. A pressure-regulating head or a regulator at the valve fixes a zone that hisses. A pump or a wide-open supply on a small nozzle does the same thing, and the fix is not “a bigger nozzle” until the pressure is measured.
Wind and height
An afternoon program in a Houston breeze will look like mist even when the nozzles are right. Move the start time to early morning before you replace parts. Call 346-642-6161 if the cloud is there at dawn with no wind. That is the hardware.