Hi, I have an iPad 2 and two problems are starting to occur frequently. First problem: when I key in a letter or number sometimes it takes a long while for it actually to register on the screen and then 3 or 4 of the character I had keyed in show up one after another. Second problem is hang up of the screen itself. Suddenly for no apparent reason when I try to scroll down it will not move! What would cause that? I am thinking of doing a factory reset and starting again!