How do you fix a water damaged pokewalker?

What I would do, although it's probably too late, is take the battery out and wait until everything dries off. I dont know how to fix one after it dried.

I agree with that comment if you can remove the battery right away. My son had gone swimming with it and once we came home it no longer worked. Then the battery went bad in it, so it was a mess. but it works fine! good luck!

Here is what I suggest, you have to remove the battery. Get the special screw driver to open the Ds and Pokewalker 360/x50. Open it up and carefully disconnect the display. This is a bit tricky if you have never done it before. there is a small black flap that presses the display belt onto the connection. You have to pull it up so it will release the belt (it has a hinge). Then take a qtip and alchohol and clean the board so that no residue is left on the board on either side. In particular by the battery if it went bad and the display belt. Then let it all dry. put on all 4 screws for the circuit board. Connect the belt by sliding it back into the socket and once securely in place, gently push the hinged flap back toward the belt put all your buttons and close it up. Secure the screws, place a new battery in the back. Now I had to push my buttons for a while before it started working (2 minutes).

Then I heard beeping and the screen came on.