Mac won't charge after water spill

Last week I was doing homework and spilled half a glass of water all over my laptop keyboard after spending $500 to fix the logic board just the week before..ahhh. I dried it off but I didn't turn it off right away and about 10 minutes later it just completely shut down. So I laid it open and upside down on a crate with a towel on it and a fan blowing under it and let it dry out for a whole week. I wasn't expecting it to work but when I tried to turn it and started up as nothing had happened! I was so happy everything worked totally fine! Well I went to charge it and the light didn't come on but then the charging box filled in with the little charging symbol and I thought it would be fine...not so much... it's at 46% and is just staying there with the power adapter. But it isn't charging at all...its just staying the same and goes down if I unplug it. Does anyone know what I need to do? I'm a college student and can't just have the adaptor plugged in 24/7. Is there something I can do or something that can easily be repaired?