1. Rice does nothing. Literally nothing!
2. Your going to have some corrosion issues down the line on the board. It's inevitable, unless you clean things up.
3. Your keyboard issue is probably just that, a bad keyboard... Not impossible to replace the keyboard on this model. Yes, it's a pain but not impossible. The keyboard is held in by 50 or so screws and/or rivets that you will need to cut out and replace with screws -- Thank Apple Engineers for that wonderful idea --
4. You will need to pull out the board and the I/O board to get to the keyboard so a good ultrasonic cleaning of the board would definitely be something to look into -- if that fails, a soft toothbrush and some 91% isopropyl alcohol should work fine.
5. Prolonging cleaning of the motherboard is just going to cause more problems. I'd pull the bottom cover off and unplug the battery and get that board cleaned ASAP. You got lucky.. It still turns on. Most Retina's we see here aren't so lucky and have board issues after a spill.
crwdns2934105:0crwdne2934105:0
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crwdns2942205:01crwdne2942205:0
Well, you fell for it! Rice or any other desiccant will not remove liquids this is an old urban legend.
The thought was if it can take moisture out of the air then it can do the same for something thats sopping wet!
Sadly, it only pulls moisture out of the air and even letting the equipment to dry out on its own will not remove the solids thats in the drink or even water (salts & minerals) all of which over time eat away at your delicate electronics.
For now disconnect the battery and keep your system cool until you have the time to properly clean your system. The sooner the better!
crwdns2934271:0crwdnd2934271:0 Dan crwdne2934271:0