A ‘spray session’ ends when you leave for awhile, like lunch or day’s end.
Cleaning is the most important regular maintenance you can do to keep your airbrush running smoothly for decades to come.
This method, also known as an end of session rinse, is exactly the same as a color change rinse except you also remove the needle and wipe it down.
If you’re good about using these two cleaning methods regularly you shouldn’t have to do a thorough cleaning very often if ever.
Do you have a screw in nozzle?
Do you have a self centering nozzle?