I'm just the messenger. These keyboards are very sensitive to moisture. Never spray a cleaner directly on electronics. Use a soft cloth and spray it lightly, then clean. If it's dripping wet, you'll short it out. Never clean it with it on. Advice given, now to the problem. Turn it of and leave it alone for at least a day in a ventilated area. Hopefully it has not shorted out. Plug in an external keyboard to test if the issue is just with your keyboard. More than likely you're going to need a new topcase. The procedure for replacement is very difficult because of the ease of popping connectors off the logic board. Also the part is about $250 used. MacBook Air 13" (Late 2010) Upper Case with Keyboard Here's how to replace it: Installing MacBook Air 13" Late 2010 Upper Case Replacement

You may.... have a stuck hinge clip? that sounds like its the issue, so do this, take everything OFF and see if JUST pressing the rubber cup works or not, as nothing is holding it down, and then see if the hinge clip moves freely, and check if the metal pins holding the hinge is not too tight, and lastly see if the hinge is broken, if it is broken, you can just buy a new macbook key from places likes www.replacementlaptopkeys.com, so make sure you check all those things, and I hope you don't have to buy a new keyboard, but usually this sounds like a macbook key issue, good luck.

http://www.replacementlaptopkeys.com/mac...