Art of Air airbrush shops makeup kit

Product Name: Art of Air airbrush shops makeup kit
Ordered this from a reseller online & it arrived while I was out of town so I foolishly just went ahead and approved the sale because I wasn't going to be home in time to test it. Air constantly flows through airbrush but makeup only sporadically is released when you pull the trigger. Could be a super easy fix but I don't know & I don't have time to try to work with it. Seller i bought it from claimed she only used it once & loved it but i find that hard to believe because even turned all the way up it barely comes out. I shops tried using it once and couldnt get it to work correctly & i have used Luminess for years so i dont think it is operator error if you know what i mean. Message me with any questions and i will answer to the best of my ability because i have limited knowledge of this item. Comes with everything pictured. Possibly negotiate on price so just message me.