A spray of water spilled on keyboard and keys type by itself sometimes/not at all/incorrectly?

My brother spilled a little bit of water on his laptop (only like a little spray, like as if you talked and you spit out a little bit) and the keys are now dry. The computer still functions, no errors, or glitches, though when I wiped it, I wiped the keyboard a bit hard. Any suggestions? Don't scare me with stupid things like "Oh your brothers laptop is dead lol" or something like that.