Use a soft brush (like a toothbrush or detailing brush) to gently scrub away any corrosion and liquid residue on the logic board and other components.

It's possible to break small solder joints with too much force from the brush. Use just enough force to remove the corrosion and residue.

Pay special attention to cable ends, battery contacts, connectors, pins, and fuses, as these parts are prone to corrosion and can easily cause the phone to malfunction.

Keep the logic board and any other alcohol-covered components over a cloth. There's a chance the alcohol can damage or mark your work surface.

If needed, repeat steps 8 and 9 until all corrosion and residue is gone.