It's probably fucked. Sorry to say.
I once did the same, turned it off asap, did drying, didn't use for a day but in a couple days it started doing same shit. When I opened the laptop, the contacts were oxidized in a couple places, not just on keyboard, I scrapped it off (btw - NEVER do this without taking out the battery and releasing the voltage first, you can destroy your motherboard or disk otherwise) but keyboard was beyond repair. Ordered a cheap replacement from chiner.