So I'm sitting in philosophy right now bored, so i figure I'll do this now. I use my MBP all day and bring it from class to class. I just close the lid when a class is over and let it sleep till the next. However sometimes (much of the time) when I wake it back up the trackpad seems to malfunction. The center seems to have no response so I use the edges to tap and click and move, and multitouch is iffy at best. It takes a restart to get it fully working again. Why?