Last night I spilled beer on my Macbook Air (incredibly stupid, I know). I immediately dried it off, powered down and left it upside down on a towel overnight. It was working fine in the moments before I shut it down, and today everything still seems to be working fine. Is it possible that there is latent damage, and if so, what should I do to protect my Mac? Or is it possible that no liquid seeped beneath the keyboard? (I think I can even see some dust under the keys). I would appreciate any advice!