Putting a water-damaged phone or laptop in a bag of rice is probably the most widespread piece of bad tech advice on the internet. It feels like it should work — rice absorbs moisture, after all. But rice doesn’t fix the actual problem, and the delay it causes makes the real problem worse.

Why rice doesn’t work

Rice absorbs ambient moisture from the air, but it cannot extract liquid trapped under BGA chips, beneath EMI shields, or between the layers of a circuit board. These are the places where the damage actually happens.

When liquid contacts a powered circuit board, dissolved minerals in the water (tap water contains calcium, chloride, and sodium ions) create an electrolyte. Under voltage, copper traces on the board begin to dissolve through a process called electrolytic corrosion. This happens within hours, not days.

While your device sits in rice for 8–24 hours, this corrosion is actively dissolving the copper traces and solder joints that connect critical components. By the time you take it out, the damage is far worse than when it went in.

Starch dust from the rice can also enter the charging port and headphone jack, contaminating the connectors.

What you should do instead

Act immediately. Power off the device. Do not try to charge it or plug it in — applying voltage to a wet board accelerates corrosion. If you can remove the battery, do so.

Bring the device to SouthBit as quickly as possible. Professional treatment involves displacing the liquid with 99% isopropyl alcohol, ultrasonic cleaning, and board-level inspection under a microscope — all before any power is applied. Time is the critical variable, and rice wastes it.

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