Soda has sugar in it and often when it dries it can cause a short circuit. I fix dozens of stereos this way after a coffee spill on them.
I simply used a dampish sponge. I pressed the area affected and let it set for a minute to dissolve what was there. There should be a little bit of water on it.
Do NOT use detergent as it can eat some electronics.
Then using another sponge I lifted the liquid up. I would rinse out both sponges and repeat three time total.
Then using a cotton towel would press on it to take up any left over water.
Let it dry and you should be good to go unless one of the wires was broken.
As for alcohol. Remember not to use a hair dryer to dry it out.
It has a low ignite temperature AND often the flame is invisible to us.
Hope this helps