Weird noise coming from Macbook Air

Hi!

I recently spilled a bit of coffee on my computer. I did the necessary things to save it and it seems to be working perfectly except for a weird vibrating noise coming from the top left corner. Before i turned the computer upside down, i put some rice on it and some of the rice got inside. I am wondering if the noise is due to internal damage or just some grains of rice vibrating inside. I am really worried about the sound and i hope that it isn't some type of damage from the liquid. If anybody knows the reason for this could you please explain it? Thanks.