I use Tamiya Acrylics exclusively.
I always flush Windex through my airbrush, (the amonia in the Windex will disolve acrylics like anti-matter )
I also blast a few sprays down the tube into the cup, and let it soak for a few minutes while I dismantle my airbrush, then I spritz all the parts with windex and rinse with water, finally rinsing out the cup.
Works great and keeps the air and paint flowing.