I took a clorox disinfectant wipe (bleach free) to clean the keyboard on my 13" MacBook Pro; and I think some of the liquid got down between the keys. Because only the ' key is being registered when I press it. OS X started in Safe Boot for about a dozen times before it suddenly stopped, so I am guessing that it thinks that shift key was being pressed down. I've tried booting off another hard drive via target disk mode, and I got the same issue. Which leeds me to believe that it's a hardware issue, not a software issue. If I connect a USB keyboard to the MBP, then I can login via the external keyboard, but that's not really solving the problem. So, should I disassemble my MBP and trying to clean/dry the keyboard from the backside? Or is there a way to reset the keyboard sensor? Thanks!