It needs to be unplugged taken apart and cleaned with 90% rubbing alcohol on the board where the salt is dried into it
get some
Rice is for fw wet- not for conductive spills. You never power on a suspected wet device to see if it works
You remedy based on the spill and alcohol is great always for boards
Two weeks ago I drove four hours to get to a place I wanted to fly and spilled coffee down my monitor. Fpv screen out, in the field.
Depending on where grounds are made it can't be brought back in the field, even after descaling. But you try because it's possible. Mine would come on, flicker and shut off.
Take apart screws see brown across some points near the on off sw
Take gel hand sanitizer and napkin and spot clean. Blow dry
Plug in
Party
You have a chance if it will still at least flicker. Be mindful of capacitors no self jolting allowed on mcguyver field runs