I messed up when I replaced a component in my iphone, everything worked fine until I cracked my screen and now I am in need to change it asap. Although I did not notice before that most of the screws are stripped/broken and most of them do not even have a cross anymore. I have been looking online (rubberband,flat screwdriver) and everything i see does not work. I need help how I can remove these screws and I heard you can drill the screw to loosen it up but I do not not have such things. Atleast 3-4 screws I can no longer remove and I need urgent help, thanks!