Disappointment / Monday product?

So far I had always install for all the family on various mobile phones films. Bin as perfectionist and patiently for such tasks. So Far. , , Have cast directly two of these films. Hold bad, had mainly been trapped dust. Bin almost desperate and really unhappy with the result. But the last slide remains - with bubbles - now first plan. Apart from goods handling, packing, delivery time and price but (actually) top. I'm assuming that I just had bad luck.