Bluetooth Keyboard won't type SHIFT + U....just started

So about 3 weeks ago I spilled some pop on my keyboard.

I let it dry and then gently ran a cloth over the keyboard that was damp with rubbing alcohol. The alcohol dried up and it works fine. 2 weeks later I am downloading some "files" and I go to type SHIFT + U....and it wont type a capital U but it will type a small u.

Makes no sense to me. I have to hit cap locks to type a capital U. All other keys are working fine. About 2 weeks ago I had some glitches with my mouse.

So I know they key works and it has to do something with the OSX at this point.

What should I do?