Gasp! Coffee spill - powers on but no sound.

First and foremost- I did all the wrong things. I know this now. Please be kind in pointing out the things I’ve done wrong here.

I am a freelance writer. I work a lot in cafes. A full 12oz latte got side swiped and spilled onto my MacBook Air. I immediately picked it up and flipped it- though I neglected to turn it off (I know I know). I eventually did after reading that it was stupid of me to keep it on.

I kept it upside down for three days. Put a blow dryer on cool & low and propped it up about a foot away and let it blow gently on my upside down Mac for hours. Turned it on on the 5th day. Powers on. Keyboard works. Trackpad works. Sound does not. Speakers nor headphone jack. I got worried and shut if off. Nearest apple store is two hours away and I’m pretty sure they’ll hear “spill” and just tell me to replace the logic board or get a new one.

Any ideas? Was thinking of tearing it down to clean out any remnants of coffee & to see if the liquid indicator was showing.

Any help is welcome! Cheers.