I have Asus GL552VW, I think I may have dropped some sweet because whenever I leave the laptop for a while I see ANTs crawling. It wasn't a problem for 6 months until 1 week ago when some of the keys of my keyboard failed. After that I bought a ttesports keyboard and left it whole day in front of the laptop. Strangely some keys of that keyboards also stopped working. But I couldn't see any bugs on that keyboard. I have another old keyboard which is still working very fine. What could be the possible reason for such random key failures ? It's not a driver problem because I checked with both Ubuntu and Windows.