When I ordered the Kärcher Hard surface cleaner, I was a bit skeptical because the Rezenssionen were very different. But since I like imagining one's own opinion, I ordered the Kärcher Hard surface cleaner. Yesterday it was finally over. Our approximately 70 square meters large terrace had to be finally cleaned. I must say I was surprised. The concrete panels were like new again and the whole took not even one and a half hours. The syringes as described in some recessions, I could not tell. Of course, the angle of inclination and the attitude of the device is important. I can only recommend the Kärcher Hard surface cleaner. Will soon also our garden paths clean it.
