After my daughter spilled her milk on the floor, I thought this would be a good test for the Z60 to see how well it does with picking up a big liquid spill like this. We have all seen the marketing videos of these roller mop robot vacuums going over huge messes of liquid and heavy dirt, I was always skeptical of whether a roller mop version would live up to those claims in every day life. I set a spot clean for just the spill area and the Z60 came over and cleaned it all up in just one pass as you can see in the video. I did have it do a second mopping pass just to be sure, but I was impressed at just how clean it was after going over it once. The fact that it picked up this much liquid without any issues has made me a believer in the roller mop. If you need a robot vacuum to clean up big messes like this or want a robot that can really deep clean your floors, this Z60 has impressed me through and through.