To skip to the end of the story before: my windows are streak-free, cleaner than ever and I had so little work here than ever before. The secret behind this is as simple as seemingly difficult: you have to use the right technique and the right angle. The strips, which remained at the beginning of my windows were it to carry back, that I have the window sucker recognized at the wrong angle and too little pressure. At the wrong angle, the continuous lip deducts not right and there remain traces of the lip with the suction openings. Although lip rested on the seal at the edge of the window, led to Schlieren. After I understood this, I was able to pull a train a clean path from top to bottom down and had my polished, wet windows streak-free drying in each ~ 20 seconds. Only at the edges you have to tighten again with a dry cloth to make it perfect. If the window sill in the way, you can get the bottom of a dry well with a horizontal train, also here without streaks when properly placing and pressure. Perfecting the technology took several attempts and some initial strip on the window has let me curse.
But after I now have a few months the unit and multiple windows could brush in lightning speed, it seems to me every minute that I have invested at the outset familiarization time to find the right angle and the right speed, a worthwhile investment. Now I use the window sucker for surfaces of my kitchen cabinets that I suck just abwische and then dry. I would buy the window sucker again and am glad that I could mothball my shammy. Although the very first application is not perfect, it is worth it in my opinion, to stay on the ball. If you have the technology only to get out, the device is top!
