I have a live little, gnat like object crawling around inside the monitor of my iMac. I tried to squish it from the outside (since that's where I thought it was) but it kept moving. I've never seen anything like this before so I'm a little curious to know if anyone else has ever has this happen. Surely this thing can't live forever, and when it does die, it will appear as a little speck forever on my screen?