MacBook air, spilled coke on keyboard but acting normal

Consider getting the tools to open up the MacBook to inspect the logic board, connectors, ribbon cables and trackpad board for any signs of liquid damage on corrosion.

The usual hotspots to identify where the liquid went is on the black sticker layer which is part of the keyboard, you will see this once you remove the logic board / battery.

You may see some white marks on the black sheeting that covers the keyboard that is where you should look especially on the logic board as corrosion is likely to be sitting at those spots.

A good way to go about this for the meantime is to use 99% isopropyl alcohol and use a brush to remove the corrosion on the logic board. You can do this on connectors and components on the logic board, ribbon cables as well but be careful with them as they are thin cables.

Avoid brushing hard on the logic board as it is possible to dislodge capacitors by doing so.

You may miss some spots of corrosion that can only be seen under a microscope as they can be hiding near very small components or chips.

Note: Avoid plugging the laptop into a charger or turning it on for now, as there is most likely still corrosion / liquid inside your MacBook which can get worse if not cleaned properly.