When I have the pressure low and am trying to pull thin lines, often I have to wait for the paint to spray. The wait seems weirdly random. I can just barely pull the trigger and sometimes nothing comes, other times I get paint. I have even checked this problem by setting the trigger stop. I have a new needle, and am pretty sure that the airbrush is clean. I end up pushing up the pressure and then it is hard to get really soft lines. Since it is random I can not practice controlling the value (darkness) of the line. Another thing I have noticed is that the paint can come out in random pulses. I have not checked that problem with my new needle. Do I have moisture in my air. I have a California tools air compressor so I did not think I needed an moisture trap. I am also in a really dry climate. These issues are driving my crazy. Thank you for any help.