I know It must have been explained somewhere but I couldnt find
there is L shaped pipe in the box (like this one https://ae01.alicdn.com/kf/HTB1ZM3FHVXXXXaqXpXXq6xXFXXXT/Free-shippingBudweiser-lion-L-piercing-wrench-socket-wrench-L-shaped-perforation-machine-repair-aftermarket-pipe-wrench.jpg )
You use that to unscrew the nozzle