So I got this sucker now get .. unpacked and tried immediately .. And I must say .. class :) Even I as a totally incompetent window cleaners get this now clean effortlessly. Apply cleaner, everything then suck us the good end the corners (and any small strips) away with a microfiber cloth and finished the window. So I got all of my windows in only 1/4 of the time done .. It's at once even fun if it's so easy to go of his hand :)