I spilled some plain coffee on my MacBook. Of course I did everything what I should.
After about 48h I turned it on and everything is ok but I'm not sure if I should clean this MacBook inside.
So?
Yes, especially if your coffee has cream, sugar in it, as that may very well increase the likelihood of corrosion. To be safe, clean the internals.
Guys, for me there is no huge difference beetween common dust and dry coffee on the motherboard.