boring details: mbp mid-2010, 10.8.2, nothing user installed, coke spilled on the keyboard a while ago but the store said it didn't get into anything sensitive --- I have been having tremendously slow shutdown and boot behavior. Today, after booting, I tried to log in but after putting in my password the computer still hadn't managed to log in fifteen minutes later. I had to eventually manually power down and start over. Programs hang and crash with unusual frequency - I don't do anything fancy to how I set up OS X so I feel like this pretty much never used to happen to me. And now it's a pain to shut down any program. Half the time, it hangs so badly I have to force quit. My activity monitor never reads high CPU usage/disk activity, but the spinning beach ball has become part of my daily work routine. I've read elsewhere on here this could be an SMC problem, so I reset it following the instructions on Apple.com. It seemed (placebo effect?) to temporarily make things more responsive. But within a day or so it was back to its old sluggish ways. There's definitely something wrong or weird with the system overall, but I have no idea what it is. Am I being foolhardy using a cola-spilled system for this long? The technician checked out the moisture sensors in it and said they had detected nothing, that the spill had stayed in the keyboard housing. But I'm wondering with this erratic behavior if that has changed somehow. What I'd really love to know is if there is a much simpler, less expensive solution I'm overlooking that will fix the baby?