My Cordless Paint Sprayer is not operating properly, what do I do? Problem Possible Cause Possible Solution Little or no material flow Nozzle clogged. Suction tube clogged. Material volume setting turned too low. Suction tube loose. No pressure build up in container. Air filter clogged. Clean the nozzle with the supplied needle clean-out tool. Clean the suction tube with the supplied cleaning brush. Increase the spray amount by adjusting the flow control knob. Tighten the suction tube. Tighten the paint container. Clean the air filter. Material leaking Nozzle is loose. Nozzle is worn. Suction tube loose. Material builds up and blocks the air cap and nozzle. Insert the nozzle tip securely. Replace the nozzle. Tighten the suction tube. Clean the blocked air cap and the nozzle. The spray is not fine Viscosity of material is too high. Spray tip orifice is too large. Material volume setting too high. Nozzle clogged. Air filter clogged. Too little pressure build-up in container. Thin the material properly. Change to a smaller nozzle tip. Decrease the spray amount by adjusting the flow control knob. Clean the nozzle with the supplied needle clean-out tool. Clean the air filter. Tighten the paint container. Cannot generate continuous spray Material in the spray container is running out. Air filter is clogged. Refill the container. Clean the air filter. Paint runs or drips on the surface There's too much paint applied on the surface. Decrease the spray amount by adjusting the flow control knob. Move fast with the sprayer. Too much overspray The sprayer is too far from the surface. There's too much paint applied on the surface. Reduce the distance. Decrease the spray amount by adjusting the flow control knob or move quickly with the sprayer. Paint is light and not even on the surface The sprayer is moved too fast during spraying. Increase the spray amount by adjusting the flow control knob or move slower with the sprayer. Related articles How should I prepare materials before using my Cordless Paint Sprayer? What actions should I take to keep the NJP801's stainless steel blade in good condition? How do I assemble my SJ-APS-2G? Pressure Washer Why are stainless steel blades preferred for gardening, landscaping, home improvement, cooking and outdoor applications?