I like electric domestic helpers and would want to miss neither my genius Ariete Staubsaugerroboter still on my iRobot Braava 380. Did I hoped a similar simplification for washing windows with the Kärcher window cleaner. My conclusion: The work with the Kärcher window cleaner I felt as awkward and ineffective ... There remain strip, it must be aspirated several times and the result is so-so ... I'm not happy with it! I found one for me simpler, less expensive and more effective method. Window cleaner spray and paper towels !!! Did with the respective method and checked after 2 window. The simple method was clearly better in both the application and the results.