Shift keys having trouble

First of all, I'm using a DELL Latitude E6410, running on Windows 7 Professional x64bit. Sticky keys is not on, controller is up to date.

So, on Monday I dropped some water on the computer, and immediately turned it over, disconnected it, turned it off, and tried to dry all water possible. We left it to dry overnight with a fan upside down and a towel below it. On Tuesday, it worked perfectly fine, no problem at all, but mid Wednesday both shift keys suddenly stopped working. I know there's a huge possibility that it's water damage or the keyboard is not well connected to the motherboard, but is there a chance that it's something else? They are the only keys that aren't working. 

Thanks everyone.