Macbook Air output sound not working.

Recently, I spilled a little water on my macbook air (about 50ml). Since then, the output sound is not working. The rest is working fine. I have tried reseting the NVRAM and PRAM but it was of no use. I also tried changing the settings in system preferences, that too was of no help. I tried connecting headphones but still, there was no output sound. I then tried connecting bluetooth but that too gave no output sound. The next appointment at the apple store nearby is after 5 days. I have to attend my online classes, please help..