The shower function on my max8 only works for a few of the openings. How can i fix, clean, or replace the head?

To clean a hose nozzle, detach it from the hose, then use a small brush or cloth to remove visible dirt. Then soak the nozzle in a solution of white vinegar to dissolve mineral buildup. Rinse thoroughly before reattaching to the hose. If the clog is stubborn, you can try using a toothpick or thing wire to gently clear the nozzle opening.