Method used: - Step 1: turn and open the spray bottle cap. - Step 2: add essence as needed. - Step 3: press the switch once. - Step 4: Adjust the appropriate valve. - Step 5: push back after setting. - Step 6: Enjoy. Cleaning step: - Put clean water in the bottle. - Block the nozzle with your finger and let the airbrush run to allow gas and clean water to flow back into the bottle (PS: be careful not to spray the sharp needle of the valve, do not hurt your fingers). - Take out the water from the bottle, repeat steps 1, 2 and 3 until no residue is left. - Remove the needle and clean it with tissues, install the needle. Important notes: - Test the airbrush kit with clean water before using it. Make sure the airbrush is not clogged. - If the airbrush cannot spray liquid, it may be because the liquid control knob is too tight, adjust the end screw. Or it may be caused by a clogged nozzle. - After 30 minutes of continuous use, the air compressor should be turned off for a few minutes to cool down. - Do not submerge your airbrush as the airbrush is not waterproof. Product measurements: - Width: 18.1 cm - Height: 6.5 cm - Length: 20 cm