Using this UV sterilizer is easy. First, make sure your brushes and implements are sanitized and disinfected. Then, open the pull - down 'oven style' door and place them on the double wire rack inside the cabinet. Close the door firmly. Flip the red rocker switch to the 'on' position. Wait for 20 minutes, and your items will be fully sterilized. As for maintenance, keep the cabinet clean by wiping it with a dry cloth regularly. Avoid using abrasive cleaners as they may damage the cabinet. Also, make sure to always operate it on a stable tabletop and use a proper 120V power source.