If anything gets dried on, 91% ipa takes it off, I usually clean up with warm water, back flush, spray through. Then alcohol and a quick rinse with water again. It takes a few passes to get it all out by flushing but it works. Warm water and dish soap works too.
I've never bought airbrush cleaner in 50 years of airbrushing, either acetone, lacquer thinner, alcohol usually get the stubborn stuff, water for the rest or soap and water etc.. Vallejo probably will.