Now when I booted up my PC it is seen that something is crawling on the LCD screen. On closer inspection it is found to be two small ants. When I tried to remove them using a small piece of paper it was found that they are not on the screen but behind the screen or may be behind its outer layer. They stop for some time and then again crawl. What to do? If they die there, each will be worse than a dead pixel or the formic acid in them may cause even more problems.