Vallejo and alcohol is gel city inside your airbrush. But you can get by with some alcohol in a mix of water, dish soap and the alcohol if you really flush the airbrush with hot water first, then clean/flush etc. with that solution. Or Try the Iwata Medea Airbrush cleaner they sell at Hobby Lobby for your Vallejo ( don't breath sprayed fumes from this stuff, it will cut your airway right off, keep it contained in a cleaning bucket. I use an old tissue box lined with paper towel and get the nozzle inside the box,then it's fine).. Everything else acrylic I use my own homebrew acrylic thinner to clean up with,including the tough to clean Stynylrez primer, it works great. That and hot tap water at the sink, the hotter the better.
Now and then I tear down the front of my brushes and soak overnight in lacquer thinner. Some folks only clean with lacquer thinner. Lacquer thinner is an acquired taste, generally it gives me a head ache but the more I use it the less so. However I married an asthmatic, now that's another story. So generally speaking I find ways around using lacquer inside. Now she loves her art work sprayed in clear lacquer ( she only works with acrylics herself) but I do them outside if to use lacquer. Her artist grade acrylics accept clear lacquer fine.