I have a case for my iPad into which the iPad slides and there is a 3/4 inch border around the screen. I bought some overhead transparency film at Staples and cut a piece to fit. (It just slides in and covers the screen. The case border holds it in place. Works with either your fingers or a stylus. Used it when kids are visiting or when we are visiting them. When it gets dirty or scratched, I just make a new one. The sheets cost about a $1 each and I have only used three in about 3 months. Now I just keep it on. Not elegant, but cheap and nothing is glued to the screen.