(A long story follows. Or, jump to the summary.)
About 10 weeks ago, my wife accidentally spilled an entire large glass of iced tea (unsweetened, thank goodness) onto and into her 1 year-old MacBook Pro. Sad day.
I followed instructions online. After disconnecting the power cord, I removed the bottom plate and made sure all the liquid was out, with a hair dryer blowing in to make sure. Unfortunately, the battery couldn’t be removed, but I sealed the laptop, bottom still off, in an airtight container filled halfway with uncooked rice to absorb whatever moisture remained.