As a hardware engineer, I work on a number of situations like this very one, and this is what I would do to fix it. Remember, as the liquid spilled is sugar-based, even after drying immediately, it will leave a conductive sugary residue behind, which is just as bad as having water on the board, so drying will NOT fix the issue. This is why laptop keyboards stick and never work properly after spilling this type of liquid. As the battery is an internal battery, don't be tempted to switch it on until the below has been actioned:
If you are brave enough, consult ifixit to take the system board out of the chassis. Purchase some electronic cleaning fluid that is 100% alcohol-based, and dose the whole board with it. This will help lift up and soften the residue, which you can (carefully) wipe away using fibre-free cloth or kitchen roll.
While the chassis is open, look for any remaining residue and wipe that up as well. As for the keyboard, depending on the location of the spill, you may need to take a hit and order a replacement keyboard.
Failing that, claim on insurance