The first test I made to the domestic windows that have already copped from last winter a lot of dirt. I know how long I usually need for a window of time, so I was curious whether it is hereby faster. But the first disappointment was the Einschäumer with the sprayer. The sprayer sprays the detergent very focused to a spot, so that a comprehensive Wipe in is necessary. Since you a window now time but must make wet to clean it can, the basic technique of Einschäumers is not recommended for a professional cleaning because too little water comes to the plate. So you can not avoid manually pre-clean the disc. So I tried the window sucker. That was not bad, the water was gone immediately, it drips nothing. But you can not get to the edge of the window, unless you wipe not only along but also across the window. Just that is too much effort for a professional cleaning, where time is money, just once. So nothing remains but nachzuwischen with a microfiber cloth and at the edges and partially also in the middle of the plate, when the angle of the wiper was wrong and therefore the pressure on the disc was too low, rid the water spots. Against the light, in particular against sun it shows especially the vulnerability of the window sucker, because it formed small fine stitching on streaks that run longitudinally over the entire window. So necessary in any case complete polishing. But it can get used to.
Conclusion: For home use, if you have more than 4 windows, as we, the device may be a relief. For the commercial use of this instrument is absolutely useless, because the pressure is not sufficient to clean trace free and the time is not to look for an area Cleaning extra to be able to go over it in the opposite direction or cross again. Here I prefer the classical methods of cotton Einschäumers Vileda & Co. and continue to take the usual puller for the windows with static rubber lip. The relatively high price of this device the effort has to clean domestic windows already be quite high but that it is worthwhile to buy this device. I'm still fairly and give three stars, it is not super bad, but not the last word.
PS: Supplement for 2 years. I use 2 of these devices for nearly 2 years in professional use. Some findings emerge only after a long time. If you get the hang of the Kärcher is super. With 20 minutes of battery life do you manage about 1.5 single-family homes. Even after 2 years the device has not yet been broken. The battery is powerful, the rubber lip is high and the time savings in daily use is considerable. So rather thumbs up.
