My friend was over playing League at my house and he accidentally spilled half a glass of water into my poker 2. He quickly unplugged it and poured out all the water and let it dry upside down for a few minutes.. and then plugged it in (even though I told him I was gonna use my QFR until it dries).
At first it seemed like it was working, then I opened up Aqua's key test. Whenever you press b, it puts b5. Press n, puts n6. And when you press U it activates the entire row...
Not sure what to do, would love to get this working again but I believe it's gone 
The bold part of the statement is where I think the sorting out with the mess has gone terribly wrong. With virtually any electronics, you never let the soaked device (especially if the liquid is not something like methylated spirits) sit for a few minutes in order to dry. You need to try the affected electronic thoroughly with things like microfibre cloths and maybe hair dryer. After you manage to get as much liquid out of the affected component you put the electronics in silica gel (where possible). Otherwise rice will do. This process requires plenty of time and patience in order to minimise the damage done to electronics.
Plugging the keyboard straight back into the computer after it has been dried for a few minutes is a huge no no. There would be traces of liquid still visible on the PCB itself but not clearly evident to the naked eye. If there were enough traces of liquid on the PCB and that it is being plugged in to some power source it will start shorting out areas of the board. In addition to all this, depending on the nature of the liquid that the electronic has been exposed to. A huge concern regarding things like rust that will eventually start infesting the affected component.
There's definitely a fair few information as well as videos out there telling how one should go about treating affected electronics. Clearly your friend here was panicking big time and making most of the wrong moves when it comes to affected electronics.
Bury it in rice for awhile, lol.
This its actually legit. +1
+1
I also agree there, if you don't have access to large amounts of silica gel, rice is the poor man's method of drying electronics after they have taken all the necessary steps in drying the said component. Rice is not as efficient as silica gel but is doable for most circumstances.
There isn't all that much other alternatives available, apart from it has never happened rice is by far the cheapest and mostly the reasonable option.
Make him buy you another one.
+1
I actually would like to say the same thing considering how your friend has treated your mechanical keyboard. Sure friends are nice but that whatever your friend did to your poor keyboard was both clueless and hesitant.
Maybe I am quite merciless but I believe it is justifiable. Mechanical keyboards aren't cheap generally.
