Take the screen off. Take off the battery cover. There are 4 small screws that hold the slider part on. Use a very small screwdriver and unscrew them. Use force and don't strip them. There is a ribbon that connects the slider to the mainboard, just use a fingernail and it easily pops up. The whole slider part will now tilt back. Carefully but firmly unpop the hinge. There are 6 tiny screws (smaller than the first 4) holding the lcd bracket to the slider casing. Unscrew them all, firmly and with care not to strip them, and the bracket will come off exposing two small ribbons that come together into one. Be careful with this. You can fold the bracket back over the casing so that they sit side by side and you now have access to the lcd screen. I suggest just letting it sit overnight and dry naturally. You can also try to use air duster to dry it. I would recommend against applying any sort of heat to it though.

Or just let is sit. The water will naturally evaporate, albiet slowly, on its own.