What to Do When Your Car Key Gets Wet

If your car key gets wet, acting quickly can prevent permanent damage. The first step is to remove the battery immediately if it’s a key fob to avoid short-circuiting. Dry the exterior with a microfiber cloth, then submerge the key in uncooked rice or silica gel packs for 24-48 hours to absorb moisture. Avoid using a hairdryer, as excessive heat can warp internal components.

For traditional metal keys, drying is straightforward—wipe them down and ensure no moisture remains in the lock mechanism. If the key fob stops working after drying, check the battery contacts for corrosion and replace the battery if needed. Testing the key in the car’s ignition or door lock will confirm functionality.

If issues persist, consult a locksmith or your car dealership. Some modern keys, like those for BMW or Tesla models, have sensitive electronics that may require professional reprogramming. Prevent future incidents by keeping keys in a dry place or using a waterproof key cover, especially during rainy seasons.

Here are the solutions for a wet car key: Use the cool air setting on a hairdryer to dry it, avoiding hot air as the circuit board shouldn't overheat. Alternatively, place it in a thin, breathable bag and then into a rice container with strong moisture absorption.

After the car key gets wet, first wipe the surface dry. If you're able to disassemble it, open the casing, remove the battery, and use highly absorbent tissue to clean the internal components.

Gently wipe the internal button contacts and other parts with high-concentration anhydrous alcohol, then allow it to air dry before replacing the battery. Similar to a wet mobile phone, never immediately attempt to start the vehicle to check if the key still works, as this will cause moisture to penetrate the inner layers more quickly.