Ok do this,
get a large bag, open your laptop and set it in the bag, buy epson salt or rock salt and fill a cup with it, set the cup on your keyboard, wrap the bag so that no air can get in or out.
Doing this will dry out the screen much faster than if you just let it sit, the salt will adsorb the water faster.
This is why they put those salt packets in shoes, new computer boxes, ect.
let us know how it turns out
Actually it's silica that they put in with shoes etc, but some of that salt that is used to melt ice and snow would do the trick. It's a supersaturated compound and will absorb water at any chance it gets. Make sure not to let it get on your computer.
Just don't worry, as long as you have enough patience your macbook will come out unscathed.
SLC