Water spillage, high fan rpm/extremely slow, improved after drying?

Hey all, I was working on my Macbook the other day when I spilled a small glass of water (like a quarter of a cup, thing literally slipped through my hand) and it fell all over the computer. Immediately I flipped the laptop over and dried all visible water (but did not power it off, because I’m an idiot), then, assuming I’d gotten it all since there was hardly any water in the first place and I immediately flipped it, finished what I was doing for another thirty minutes and then closed the laptop.

Two hours later, I opened it up to use and the fan was running at an extremely high speed and very, very slowly. So I think, crap, it must’ve been the water. I immediately power it down, crack it open in a dry environment and leave it to dry for 48 hours. After this I powered it back on to test it and it appears to be running fine again.

My question is — what should I do before committing to using it again? Should I remove all the components and blast with an air compressor? If it’s running fine, does that mean there’s no trace of water left in the system? What preventative measures should I take to ensure that the (lucky) “fix” is permanent?

Thanks for the help!