Get loads of those silicon gel packs that come in shoe boxes and whatnot, can buy bulk on internet. Remove the laptop's battery and seal in a bag with these gel packs for a few days. will draw any remaining moisture out. DON'T heat the laptop, you may damage it. And definitely don't use rice! It gets stuck everywhere, and is impossible to totally get rid of.
Should it not work after this, there are loads of people on here who are very good at sorting these things, let us know and we can help you!