Why does the speaker of the Xiaomi 15 produce noise after being exposed to water?

If the Xiaomi 15 comes into contact with liquid, please refrain from using the phone for audio playback, microphone recording, or any other operations until the device is completely dry. If audio or microphone operations are being used while the phone is exposed to liquid, there can be issues like sound distortion or a mute microphone, which could eventually damage the phone over time. It is recommended to ensure that any moisture entering the audio channels is fully drained and that any remaining liquid is completely dried before resuming normal use.
If your phone comes into contact with liquid, please remove all connected cables (including but not limited to data cables, headphone cables, etc.), then use a lint-free soft cloth (such as a glasses cloth) to wipe the phone dry. Hold the phone with the top and bottom audio speaker and mic openings facing down, and gently tap the phone to expel excess liquid. Place the phone in a well-ventilated, dry area to accelerate the drying process.
Friendly tips:
1. Please do not perform audio playback operations while the phone is submerged in water;
2. Please do not use external heat sources to dry the phone;
3. Please do not insert foreign objects (such as cotton swabs or paper towels) into the audio speaker or mic openings.