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Air-Valve Autobot!
I've been using the Iwata HP CS and I do back flush a fair bit to clear the clogging and I do it for cleaning as well. I'm finding the paint has started to flood the chamber including the lever and the air valve guide. It's to the point now the lever will get stuck and spray automatically. And this is a new airbrush. I clean them very well after each use. I think it may be because I use too much air to do it, could this be the reason? How do you do it?