iRobot Scooba 390 Floor Scrubbing Robot 4-Stage Cleaning Process Scooba 390 keeps cleaning solution in a separate tank so that only clean solution is placed on the floor Extensive Coverage - Scooba 390 has a wide cleaning head ideal for kitchens and other large areas up to 450 sq ft Easy to Use- Let the robot do the work All parts that need to be cleaned or maintained are now colored grey and orange