Got a free 2009 MBP from someone because a drink had been spilled on the keys and they were so sticky it was nearly impossible to type more than brief emails (used it for surfing and non-typing things). Suddenly today it works like the keys were never sticky. I didn't do anything to fix the problem. The only variable I can think of is the weather - it has just changed to spring-like, and thus is more humid as of three days ago. Any other ideas as to why the keys are no longer sticky? Thx.