Lid: The best way to clean the Ellie lid is with the inside of the white bag that you receive in the box with your Ellie. Simply turn the bag inside out and rub the lid softly. Otherwise, a microfiber cloth works great too. Microfiber cloths are often times included when you purchase new eyeglasses.
Tray: To clean the inside tray of Ellie, get a clean cloth damp with water then ring out excess water. Avoid immersing into water. Particularly avoid getting water on to or inside the lid. Proceed to wipe the empty compartments and remove any particles that you may see. Let the device dry completely before adding pills back into compartments.