I thought I'd post this one up as many peeps have these issues and it may save some grief or answering similar questions. This is one of our articles at AirbrushAnswers thats generally only for our supporting members but as Christmas is coming and I'm all full of goodwill and as I luv ya's all LOL I thought it may help out a few here a little...Forgive any formatting issues as it is a direct copy and paste and I may need to post it in two sections as it is a long article.. LOL.. Airbrush Trouble Shooting Guide This is a bit of a trouble shooting guide I've written up that mainly concerns itself with some of the basic issues that may arise for many and a basic rememdy on possible ways to avoid or solve the issue when it happens, hope it helps out a few diagnosesome of their airbrushing issues....... No Air Flow- Diagnosis/Remedy- Fault In Compressor- Check all your basics like power supply and in fact its turned on, has happened to the best of us Regulator or Water Trap Fault- Occasionally water traps and regulators do break, if your unsure, disconnect each appropiate section, charge the compressor quickly until you find yourself at the point of the issue. Line Kinked or Blocked- Again has happened to everyone at least once, maybe 20 times if using coiled hoses, trace down the line and ensure no kinks are present or something isnt physically blocking the hose. Airbrush Air Valve assembly Sticking- Quite often the airvalve at the point of entry in your gun will get sticky, if air is coming out of your hose end but not going through the gun, lightly oiling and checking the valve for dirt, dust or paint incursion is important. No Medium Being Sprayed- Diagnosis/Remedy- Paint is To Thick- Your paints thickest consistency should be that of around milks consistency. Too thick it may not spray or spray poorly, overreducing may help but can also cause its own issues finding the happy medium is the idea and this can change due to temperature etc but wont vary a lot off that original milky constency. Dried Paint in Nozzle- Remove the needle and clean. Paint Flow from Resivoir Blocked- Clean the reservoir and ensure you can blow through all hoses, quite often the suction feeds get a blockage where the hose changes angle through the lid, clean well. Needle Stuck in Nozzle- Remove both nozzle and needle, clean and replace, check for dried paint inside Nozzle mouth and remove. Needle Locking Nut- It may be looses , tighten Lever Assembly Damaged- Replace(See Your Airbrush Manufacturer) Bubbles Appearing in Coulor Cup- Diagnosis/Remedy- Nozzle cap Loose- Tighten and or seal with Soft Beeswax Nozzle Washer Wear- Remove and replace (See Your Airbrush Manufacturer) Mismatched nozzle and Cap- Does happen especially if you have a gun with multiple heads and needles, remove and match the right set. Spidering- Diagnosis/Remedy- Air Pressure Too High-Reduce air pressure until problem disappears, painting on different mediums requires different pressures and if its a smooth surface, high pressures won't be your friend Too Close-If your too close to the work surface it may introduce spidering, by moving faster or by reducing pressure again this may help solve the issue, Also try spraying at a slight angle to the surface, this also can help. Medium Is Thinned Excessively- You may have over-reduced your paint, have another look and see if you think it may indeed be to thin and causing some issue.