One thing that drives me completely and absolutely crazy is when my computer screen gets filled with smudges. This is caused by the many (usually dirty and/or pretty greasy) fingers of my children which they use to point at various items of interest. I must have told them a million times not to touch the screen. Do NOT touch the screen! Often enough I catch them red-handed, in the process of holding their forefinger so that it (almost) makes solid contact with the moving animation. Stop or else. Do not touch the screen. How many times do I have to tell you guys?! I grab the Glass-ex and cloth and go to work on the smudges until the screen is as clean as it could ever be. Maybe even cleaner than when it was delivered to my doorstep. My kids reaction is predictable: c'mon quit exaggerating, you are always doing that! I figure that if I spray the Glass-ex on the screen at precisely the wrong moment when they are in an important multi-player shoot out or when there is only two more seconds to make a move, obscuring their view with the rubbing rag which completely covers the screen, that by getting them mad enough they would remember. Now if they would be careful and NOT touch the screen like I have told them a million times, then their old man would not pop up at exactly the wrong moment for these cleaning shenanigans. But then again, they never learn, never care to remember. There are more important things in life at that age than becoming fixated by smudges. Perhaps there must be some kind of compromise. I could be exaggerating by getting so overly upset by a couple of tiny smudges that the normal human eye could barely make out unless it inspects that corner more closely. Ah there it is that bugger! But it bothers me, so there. I spray another layer of Glass-ex just in case I might have missed another invisible smudge. You never know what you might happen to discover upon closer inspection. Or even miss altogether and not see for some reason, so just eradicate all potential smudge areas just in case.