Bubbles and Scratches from the surface

My experience with the Hori DS Lite Protective Filter was not a good one. Firstly, this product must be applied with complete lack of dust, which I found to be facilitated by the inclusion of a cloth to wipe the screen clean of any dust particles. However, this is near impossible as the smallest dust particle creates an air bubble of a very large magnitude. This results in, me being unsatisfied with even a single air bubble, taking the filter off and on again until satisfaction is attained, but in this process I managed to bend one of the corners in pulling the filter up off the surface of the screen with my fingernail. This problem, I am assuming, is present with all screen protector and is not necessarily the fault of Hori but of the nature of the product.
Second, the touch screen filter is obviously meant to protect the screen from all kinds of scratches. Now, after applying the lower screen's filter and upon using the stylus to play Professor Layton, the stylus left extremely  more