TO ADJUST THE NOZZLE Remove the battery from the unit. Insert the nozzle wrench into the front end of the unit. Rotate wrench until the tabs on the nozzle and the slots on the wrench are lined up. When the wrench slots and the nozzle tabs are lined up, the wrench will be completely inserted into the front end, rotate the wrench clockwise to adjust to a different size spray. The largest particle tip has a line cut through it, rotate clockwise until you hear a click to get the medium particle and rotate clockwise again until it clicks again to get the smallest particle. Remove the wrench when complete. TO REMOVE THE NOZZLE Remove the battery from the unit. Insert the nozzle wrench into the front of the unit. Rotate wrench until the tabs on the nozzle line up with the slots in the wrench. When the tabs and slots are lined up the wrench will be completely inserted into the front end. To remove, rotate the wrench in the counter clockwise direction until the nozzle comes loose (¼ rotation). Remove the wrench when complete. TO INSERT THE NOZZLE Remove the battery from the unit. Insert the nozzle into the wrench, lining up the tabs on the nozzle and the slots on the wrench. Insert the wrench with nozzle into the front end of the unit. Push in and rotate the wrench ¼ turn counter clockwise. When you hear a click the nozzle is in position. Remove the wrench when complete.