How to fix water damage on MacBook Keyboard?

If it is just a drop of water and the laptop is still working, then it is probably Ok. Besides any damage is already done although it can take days or even weeks for enough corrosion to form before you may see a failure.

FYI, you should only use a very lightly dampened cloth where no water can drip from it or the surface of the device. I personally prefer to place the laptop with the back of the open display flat on a smooth table top with the Keyboard/Palmrest vertical in the air. This allows me to hold onto the upright keyboard/palmrest to easily clean the display without the display bouncing, moving, or twisting & risking possible damage. You still need to be careful not to get any liquid near the edge of the glass since it can make its way inside the glass to cause damage.

I’d like to chime in with this:

Click ▶︎ Apple Polishing Cloth.

I have not used any liquid on my MacBook Pro Display.

This was the best purchase ever! 😁

Good luck! 👋🏼😉