Unfortunately it may never be the same again. Water can be recovered easily from because there isn't much in it - clean and go. But the sugar in soda will often kill electronics - even with cleaning.
I would try doing an SMC reset (remove battery / power, press and hold the power button for 5-10 seconds). Then I would do a PRAM reset (press and hold CMD + OPT + P + R, hit the power and let it reboot it self 5 times while holding the keys).