If you drop liquid on any device you should never try to power the device until you are completely confident that it is dry.
You should power off, remove power cord and if removable disconnect the battery.
Failing to do so will damage your device, since liquid and electricity do not make a good combination.
You could leave it for 3-5 days in a dry warm place so the liquid drys up, evaporate, etc.
It could help to place the laptop side ways so the liquid could exit thru the sides.