I have a 2014 13" MacBook Air and the screen has been extremely loose for quite some time now. If it goes beyond 100º or so it will fall backwards, but when it is being closed, it will not fall closed. Please help! its so difficult to do homework with a computer screen that keeps falling down. I'm not sure if i should take it to the apple store if they will fix it or if it will be easier and cheaper to do it myself. Thanks so much!!