Bit of a pain to clean, although I've found you can give them a lot more cursory treatment than some people recommend. In a year I've only needed to give it a good soak in lacquer thinner (take out the rubber sealing ring first) once...the rest of the time I blow through some window cleaner then swab with a cotton bud dipped in thinner....wash out the paint cup and job done
PS I recommend a double action airbrush with a cup on the TOP, not a suction cup on the bottom like what I have which is a bit of a pain...takes more pressure to draw up the paint and is annoying to clean.