Remove the cord from the wall socket before attempting to clean the unit.
Remove the ozone plate (or plates) from the back of the unit by gently pulling outward. The plate is located in a slot on a solid wood backing. The plate is easy to identify and remove.
Scrub the plate gently with a toothbrush and equal parts of ammonia and hot water. Clean the metal screen and the ceramic tile that makes up the purifier plate.
Rinse the plate with clean water and allow the plate to dry completely before reinserting into the unit.
Replace the plate to the back of the unit and plug the cord into the wall socket.