Hello James what your getting is condensation becomes the air is hot coming out the compressor and cools as it traveled down the airhose (think of a moonshiners still) You can do one or two things to fix it? 1. Add another hose between your compressor and your moisture trap. 2. Add another moisture trap at the airbrush (pistol grip type as stated before) 3.Add a tank to your compressor. (with a drain plug to drain the water out of it) 4. Buy a compressor with a tank already attached ( recommended ) Also take the hose off and hang it up overnight to get any remaining water out of it!