Rice trick works.
I read an article about saving units exposed to water. You can search it to give you more ideas about it. These are the things that I remembered from it. I know someone who used this for a nokia phone that was accidentally dropped in water.
If it was immersed in salt water, you need to wash it using water w/ no salt in it. After washing, dry it and remove all removable parts. Put it in a storage where there is uncooked rice. Make sure your unit is immersed in it and leave it for at least 24 hours. You can leave it for 2 days if you want to. After doing this, turn on your unit and hope it turns on.