My Honeywell was too big for dishwasher. In cold northern winters, I kept a short length of old hose and rinsed outdoors. I pre-squirted some non-caustic detergent like orange Fantastic, not really knowing if it helped. Didn't leave on very long before rinsing with hose.
Best to leave electrically off with furnace on for half hour or so to dry unit or lots of snapping electrical sounds of ozone burning!