So I clean my macbook air every month or so, and trust me by that time it really needs it. I'm always nervous about the screen though, I use an electronic pre-moisted wipe and it gets the job done, but it always leaves streaks all over my screen. This doesn't seem to bother it though, I was just wondering if its ok that it leaves streaks on my screen. It gets rid of all the crap on it like dried up saliva (from laughing at a youtube video or something) and dust, but leaves streaks all over it. They go away after a while but just wanted to be sure this was safe.