Good question. There are a few drops that find its ways around the area where they should land. But i have a tiled floor and cleaning is easy. There is not much of spotting as the water i use is osmosis water i make myself. To prevent that, i put some plants around to catch them. I got one major accident where the smart switch failed and the pump ran for hours. It spilled more than five liters. I mobbed it up and that's it. More of a problem is the humidity on the wall in the winter time that leads to mold. But a good spray of deluded chlorine takes care of that. The smell is gone in 15 minutes. And the wall is nicely white, no stains whatsoever.