The best course on a liquid spill is to power off the computer immediately and remove the battery and the ac adapter. Since you have replaced heatsinks and other tasks then it would be a good idea to take the covers off of the laptop and look for moisture and clean it up with cotton swabs. Corrosion starts when the PCBs get wet and get worse if the moisture dries without clean up. 90% isopropyl alcohol also helps pull water away from exposed metal connections. The keyboard can be removed and soaked in 90% isopropyl alcohol to remove water and debris.
You can still do the clean up, but there will be more corrosion to deal with at this point. Corrosion usually looks like a white clump of powder that clings to different components. This corrosion also can be cleaned up with 90% isopropyl alcohol. Use a magnifying glass or a microscope to check the damage from the corrosion.