I just finished following the directions suggested by everyone on this post.
I ended up using 99% alcohol to wash the logic board, and used a soft tooth brush.
It helped with some issues from the spill, so that is good! Unfortunately my wifi still doesn't work - so I'll try dealing with that next.
Anyway - thank you to everyone who posted on here. It was immeasurably helpful - and the whole process oh-so satisfying!