What a trashy

I bought the sharpener with anticipation. But the sharpness effect is barely noticeable, it just looks like the knife his steel / metal loses (little squiggle that dissolve during the sharpness process). Then the blade is almost as dull as before. A repetition of the process brings no improvement. It is even I noticed that in the cutting very small pieces are broken out. I also find it impeded that the angle of the tungsten carbide teeth can not be adjusted, because I noticed that the angle is set much too dull, compared to the cutting angle of my knife. Fortunately, I have only very cheap IKEA knife as test objects, which is why there has not to cry, that have suffered.