Isopropyl alcohol is a mild skin and eye irritant. Use gloves and eye protection while working with isopropyl alcohol.

Fill your container with high concentration isopropyl alcohol (90% or greater) and submerge the logic board and any other components that show signs of corrosion, debris, or other liquid damage.

Do not submerge the display or camera modules, even if they are damaged. Submerging them in alcohol will likely damage them further.

Allow everything to soak for 5-10 minutes, or long enough to loosen hardened residue. Swish the parts around a little as well, to displace any trapped liquid.