Because my brother just that. I wipe the outside but what about the water in the inside?

See if it works and if it doesn't wait to have it dryed up and if it still doesn't work break it with a hammer. Wait that means no brawl O_o so we won't play today.

put it in a warm dry place and let it sit for a long time. If you can put it in the oven at 120-150 for a few hours that would work great too, but you have to be very careful with that

If it was off when the water was spilled, and you dried it enough it will work perfectly fine. If it was on, then who knows if it will work or not.

let it dry

Run out of your house; ITS GONNA BLOW!!

the best thing to do is to sop up as much of the moisture as you can and make sure no water actually got inside the unit.  if it did, turn the opening it went in upside down and let it drip dry on a paper towel or two.

make sure to allow plenty of hours of dry time to make sure any moisture has been able to evaporate b4 you plug the unit in and turn it on.  you do not want to power it up if there could be any residual moisture on the inside making contact with the electronics.

finally, why keep a piece of electronics where liquids can be spilt on them?  /boggle

Turn off the console right away and get some towels to clean the water off the console.