Put paint thinner on an old eye dropper bottle. Make sure you label it since paint thinner would be bad for your eyes.
Immediately after spray painting ( I do this after every coat) pull off the nozzle and drop some paint thinner on the top of the tube. Then drop a drop into the bottom of the nozzle. Let it soak for a second or two. Using a paper towel to catch the spray, stick the eyedropper into the bottom of the nozzle and give it a little squirt. Do this a couple of times. You will see the paint particles blowing out of the nozzle.
Put the nozzle back on. When you spray the next coat, remember that the thinner you put on the tube will splatter a bit, so start off to the side.
