Im a certified Apple tech and isopropyl alchohol wipes are the best thing to use to clean the internal components.
http://www.johnbarry.com.au/products...-alcohol-wipes
Once the spill happened you should not have turned it on. You've now increased the likelihood of things randomly shorting out in the future. The internal components are probably already corroding. You'll probably start to notice lots of unusual behaviour in the short to mid term as the corrosion gets worse and worse.
The steps to take after a liquid spill.
Immediately unplug the power and remove the battery. Under no circumstances try to power it on.
Take it to a tech so that they can pull the machine apart and clean and dry each component individually. This is labour intensive so expect to pay.
After it's properly cleaned and dried the tech will test it to see if it will power on. If it works again you will be able to force some more life out of the machine but don't ever rely on it lasting forever or always being reliable. You spilt liquid on and in it so there
could be lots of invisible damage regardless of how well it was cleaned.