Hi all and thanks. I did it! The video was useful just to see with my eyes it could be done
. After that I followed the link to the German forum where Pocketgoods have been explained you could use rubber gloves. I took my wife's one and it worked. Pressed and held the button , propped up the reader with my thumb/between the speakers/ and with the other four fingers I slided the cover. At some point I had to push down the cover with little bit more pressure just to make good contact with my fingers. Now I can confirm it's easier than I thought. Thanks all!