Some pretty bad advice on here if I do say.
First, letting it dry out is a bad idea, this allows corrosion to develop and damage things further.
Secondly, rice doesn't work and never will work.
You should take it to a repair shop which uses an ultrasonic cleaner, this is the professional way of cleaning up liquid damage. If you can't do this or fancy opening it up yourself, then you can use 99.9% isopropyl alcohol and a toothbrush to clean up excess water and corrosion that has developed, although this isn't as effective as using an ultrasonic cleaner, it is a lot more effective than rice and leaving it to dry and get worse.
How do I know this works? Because I have cleaned up a lot of liquid damaged phones with a fairly decent ultrasonic cleaner, and have had a fairly high success rate. You can also ask actual professionals how they do it, and if they don't mention at least using an ultrasonic cleaner, then they are not cleaning up liquid damaged phones very well. :-)