> Why do you think it's ineffective, It appears too small to have enough mass to use gravity to be able to do a thing with dried guano. Also, because it has wh

> Why do you think it's ineffective, It appears too small to have enough mass to use gravity to be able to do a thing with dried guano. Also, because it has wheels, it gives me the impression that it moves along and does whatever cleaning its capable of as it goes rather than lingering anywhere to thoroughly clean one spot. > they could have a pressure washer inside that thing How big of a water tank do you think?