... of the sands dry and cleen, so the pets may live in a safe and sanitary environment. At the same time, cat ... agent, which absorbs some easy-volatile gas and moisture in the air and make the room fresh and clean for ... a Iayer of cat sands with thickness 1.5 inch in a cat sand box.2.Clean the waste regularly ... period:1) As using them, we should put the box in a ventilating and dry place. 2) After use, put ...