airbrush not spraying with needle cap off?

Grex Airbrush - Support Documents

How to Clean an Airbrush Properly

9Pcs 0.2mm 0.3mm 0.5mm Airbrush Nozzle Airbrush Needle Nozzle Cap Kit Replacement Parts for Airbrush Spray Gun Sprayer Accessories Painting Machine : Arts, Crafts & Sewing

Airbrush Nozzle Tool Nozzle Kit Wrench Airbrush - Temu

Two new airbrushes coming from GSI-Creos

1.What you will receive: package comes with 3 pieces airbrush nozzles, 3 pieces airbrush needles, 3 Needle Cap Protective Sleeve, 1 piece wrench.

10 Pieces Replacement Parts Kit with 0.2/0.3/0.5 mm Airbrush Nozzle,Airbrush Needle,Needle Cap Protective Sleeve,Replacement Parts for Spray Gun

Thayer Chandler Air Brush : Thayer & Chandler Airbrush Co. : Free Download, Borrow, and Streaming : Internet Archive

New to Airbrush? Here's a Simple Guide to the Basics

0.2/0.3/0.5mm Airbrush Nozzle Needle Replacement Parts for Airbrushes Spray Gun