The Humdifier's tank, cap, and tray can all be put in the dishwasher. Essentially, any part of the product that holds water, can go directly into the dishwasher!
Do not place the body of the Canopy Humidifier, that houses the fan, into the dishwasher.
There is one piece of the Humidifier that touches water that will need to be cleaned by hand but it should be a breeze. On the bottom of the body of your Humidifier, there are two small metal rods set in plastic that work to check the water level, sometimes calcium and iron from your tap can buildup here. Unplug your Humidifier from the power source and then wipe these down with a damp paper towel or sponge. There's no need to unscrew anything!