If you have not resolved this issue arleady, make sure that the nozzle and air cap are screwed on well. If the nozzle and air cap are loose, air will bubble back up into the cup. Many artists loose...
If you have not resolved this issue arleady, make sure that the nozzle and air cap are screwed on well. If the nozzle and air cap are loose, air will bubble back up into the cup. Many artists loose...