I've done all the cleaning spots that i could find and spent some time wandering around the building wherever it'll let me go... but found nothing else to do during that wandering and it only took me about 6 minutes to get there. So it seems that it's just clicking a few shiney spots on the ground to trigger cleaning animations and nothing else. I can't find any way to interact with NPC's or item and anything else. Could be broken, we'll see.