I have a Macbook Air A1466 2012. The 'T' key keep getting stuck and recessed under the metal and popping up and off. Do I need to replace the keyboard or can I just replace individual keys and hinges as they fail or get loose ? All the keys work but some seem to be getting a little loose. Will a replacement key and hinge do the trick ? I really want to avoid a topcase replacement or keyboard replacement as it looks very complex. It seem to me that most of the keyboard replacement are being done due to liquid spill or some goo getting into the keyboard. Can someone provide some insights ?