Before using make sure the nozzle head is firmly connected with hose so as to prevent leakage; - When you first time use this water gun it is recommended to fill and extend hose and slightly stretch it to release tightness in outer folded material covering; Then release water and refill to use normally; - When you finished using this water gun turn off the faucet and open the nozzle to drain the water in it and the hose will automatically contract back to its original length. Notes: - Do not leave the faucet turned on and the hose under pressure when the water gun is not in use; - Do not over pull the hose when the hose is empty; - Make sure the water remaining in the hose been completely drained before storing in winter so as to protect the hose; - Do not run hot water through the hose; - Do not drink water through this hose.