I swapped my battery and hard drive today in my mid 2009 Macbook Pro and noticed thereafter that some of my keys are now stiffer and click loudly. I should mention that I did spill a few drops of tea on the device the day before, but the keyboard and device were fine beforehand so I'm doubtful that that was the cause. It may have caused the dimming of the backlight however... Is it possible that the keyboard parts are slightly misaligned now and maybe opening things back up and repositioning would help? I have an appointment set up but of course I am out of warranty, and it is likely something I've done. I also don't have the money to pay them for any repairs. Any and all suggestions or advice are welcome and appreciated. Thanks!