i recently spilt some milk on my keyboard. right after it spilt unplugged it, i turned it upside down and got as much milk out as possible. i let it dry it dry in a kinda diagonal upside down position, so to let all the remaining milk drain down and out. i waited till i knew all the milk was dry to turn it on. everything works fine, expect for the area where the milk was spent. around middle c. the keys still create their note but theyve lost almost all of their resistance to my fingers, causing them to make an annoying knocking noise. does anyone have any advice on fixing this?

its a yamaha dgx-300 by the way