Some keys won't work

I spilled some ramen on my laptop a few days ago, and I let it air out, it's fine, but some keys won't work The period, foward slash or question mark, sound up, and power off button won't work at all I've found my way around the sound up and power off button, but both of them and the rest of the keys are still annoying to not be able to type I do BBcoding, so you can see how the forward slash is extremely annoying, and I hate not being able to do periods, because it just looks like my sentence is going on and on Also, I can't highlight things, so naturally I cannot copy and paste Is there any way to fix the keyboard