I've been asked a couple of times how I clean my airbrush after a paint session. I initially clean the brush with W5 window cleaner - the blue stuff from Lidl. Then at the end of the session use my - sorry Morags Ultrasonic Cleaner to really clean it up. Found this youtube video using an additional cleaning agent - for the time you forgot to clean the brush - of course non of us will ever do that. Paul