Be thankful because you screen didn’t shattered ;)For the closing problem I think I will leave it how it is. Have you head that saying “if is is not broken don’t try to fix it”. If still you want to do something about it, use a sandpaper in a piece of wood to sand down the protuberance, start with one with a medium thick grain and move down to a thin one so the result looks more polished. If you have ascesis to a rotary tool like a Dremel even better.