How To Clean A Circuit Board That Got Wet. Isopropyl alcohol can also sometimes be used to clean the board and dry it. Rinse the circuit board with clean or distilled water to remove any sticky materials.
Alternatively, spot clean your circuit board with isopropyl alcohol. If your pcb gets corroded from water damage or from another source, cleaning it may repair it. The other is using a special circuit board cleaning spray.
Pat the board gently with a cloth to remove the majority of the moisture and allow it to dry completely.
You can do the same with the keypad. This is generally what kills the circuit. To do so, you’ll need: Soak the circuit board for a few minutes in warm water with a little detergent in it.