Sorry if I was vague. It keeps clogging up. Usually I mix the paint stick the cup in. Then test the colour a mix on some cardboard, if it is fine I paint the model.
But as soon as I test it out, bubbles come out of the cup! And if it does not bubble from the cup it starts to bubble from the gap between the head and the shell.
Sometimes I can get it spraying, but it does not spray a steady stream more of a "spray-pause-spray-pause-spray"
I aprreciate your help.