- It's a robot I think you'll find quite helpful. - When I washed the robot for the first time, I noticed that it had been assembled with great care, with extra silicone seals placed at several of the joints and junctions. A tank's worth of water at the highest water flow rate (combined, in which the brush functions) may wet around 65-70 square feet of floor space (assuming 10 square feet per tile) before it is consumed or absorbed. - Before I begin cleaning, I wet the cloth well across its entire surface so that the washing can begin quickly and in full volume.