Is the screen blank all the time?
If you look really hard can you see the items on the screen but they are really dark? If so the back light for the lcd may have burned out.
Take a look at the following site for instructions on disassembly.
If you feel comfortable with it, you can easily replace your own.
A new lcd runs about 50 dollars shipped. If you buy it from ebay, they
will usually come with instructions and the screwdriver you need. A T6
torx driver is the type needed.Sidekick LCD screens
Good job on drying it out and pulling the battery. Thats the best thing you can do when you get it wet!