Disappeared Touch Bar

I spilled water on my 2018 13"MacBook Pro. After the spilled, everything is working just fine (keyboard, screen, trackpad, finger print, speaker) unless the touch bar only showing the "esc" button. I put it on rice for 15 minutes then take it away. I also turn it off and rest it for several hours. The touch bar then appearing but it start to randomly push button on the touch bar (sometimes it continuously push the esc button or the volume button and other button also). This issue occurs unpredictably, it can touch the button for like 15 minutes after usage and then it start to stop touching the button after for example 1 minute the issue occur. I restart the mac to overcome the issue and then use it again since i do not have any other device to support my study in online class. And the next day after i put the mac on rest, the touch bar issue is disappear and it works just fine (all button can be touch and drag (responsive)). Today i update the mac's software to the big sur. After update, everything is working until 2/3 hours of usage my mac touch bar is disappear again (completely black background) and there is a "zip-sound alike" from the right side of the mac but it only last for 10 minutes more or less. The touch bar remain disappear and i don't know how to overcome this issue. Thanks for any help and suggestion, i'll be more than glad if anyone wants to give any response regarding my issue.