Water is a conductive liquid. When water droplets, moisture condensation, or fluid spills sit on a capacitive screen, they introduce a distinct capacitive load. The controller cannot always differentiate between water and a finger, leading to touch drifting or multi-touch dropouts.

• Solution: Simply wipe the screen dry to restore normal operation. For outdoor or washroom environments requiring water-resistance, a specialized touch IC (e.g., ILITEK, EETI) paired with water-rejection firmware tuning must be deployed to filter out water-induced capacitance signals.