Bests & Worsts Reviews from Amazon

I just used one of these MagicFiber cloths to clean my glasses, and the glasses are worse than before I cleaned them. They are cloudy like there is a film on the glass (I can't see through them). And it was difficult to clean that off with a cotton cloth. If you rub the MagicFiber cloth a bit, you can feel an oily film on your fingers. I bought these same things a year ago and they worked great. I had to buy more because everyone "borrowed" them from me. But as they are now, they can't be used. How does the product get worse? Is it just me? How does every review not report this? Do not buy these.