Macbook Pro trackpad water damage

[DonGir]

3 weeks ago i spilled a drop of water onto my trackpad and started acting crazy, i turned it off, flipped it over and let it dry, but 3 weeks have passed and the trackpad is still presenting symptoms, i don't know if there still water inside or if it's permanente damage. The trackpad lower area above the click does not recognize any finger movement, it sometimes works perfectly after i left it shut down for a while but then erratic movement starts to pop-up and after a while the lower area of the trackpad is not recognizing again. The trackpad recognizes all finger gestures, so it works perfectly fine while the lower area of the trackpad does not recognize. Sorry if it's difficult to understand, English is not my first language.

EDIT: On an update looks like the trackpad recognizes on all areas and functions correctly for like 10 seconds after i wipe it with my shirt or something. But after some time the trackpad returns to no working in the lower area and jumps erratically again.