I don't know, for me it's real easy to clean the AB.

Just run some lacquer thinner through it once, break it down and clean the needle and nozzle with thinner and then re assemble. Then run some Vallejo Airbrush cleaner through it just to keep it lubed and there ya go.

I guess it's the advantage of using a Harder & Steenbeck Evolution.  Very simple to break down and clean.