Fill the Tank: Ensure the unit is completely cool and unplugged. Unscrew the safety cap counter-clockwise. Use the funnel and measuring cup to pour up to 250ml of water into the boiler (do not overfill to allow proper steam room). Screw the cap back on tightly.Mount Attachments: Align your selected nozzle or hose onto the short permanent front spray tip. Push in firmly and twist clockwise until it safely clicks/locks into alignment.Heat Up: Plug the power cord into a grounded outlet. The indicator light will immediately illuminate to show that the boiler is heating water. Wait roughly 3 minutes for the proper pressure to build up.Operate: Slide the safety lock forward on the handle trigger, then press the trigger down to discharge steam. Point the nozzle away from people or pets, and move slowly over the target surface.