Well, I'm not familiar with CCleaner and knowing my luck I would delete all of my cookies by accident lol. Interestingly, I suspected an extension, so disabled 'Clearly' and surfed for quite a while in Chrome. After an SAS scan it was clean. I then re-enabled Clearly and surfed a bit more to see if it would contract a DoubleClick cookie quickly. But so far I haven't found any tracking cookies. Curiouser and curiouser eh?