How sound frequencies eject water
Water in a speaker grille sits in the tiny gaps of the mesh, held in place by surface tension. Specific low-frequency audio tones — typically in the 165 Hz range — create vibrations that overcome this surface tension and physically push the water droplets out of the grille.
The app plays carefully tuned frequencies at optimum volume settings designed to maximize ejection force without risking speaker damage. This is the same principle behind the Apple Watch Water Lock eject tone, made available to iPhone users.
Step-by-step water ejection
Open the app and hold your iPhone speaker-side down, or at a slight downward angle. Tap the Eject button. The app will play a series of tones through the speaker for 10–15 seconds. You may see or feel water droplets ejecting from the grille during this process.
Run the eject sequence 2–3 times for best results, especially if the phone was submerged rather than just splashed. Between runs, gently shake the phone (speaker down) to help dislodge any remaining water.
Which iPhone models does it work on
The app works on all iPhone models — both water-resistant (IP67, IP68) and older models without official water resistance ratings. Water-resistant iPhones can still trap water in the speaker grille even when the internal components are protected, and the eject function is equally effective on these models.
It also works on the earpiece speaker at the top of the phone and on the microphone openings. If any audio opening sounds muffled after water exposure, run the eject sequence on it.
After ejection — what to do next
After running the water ejection sequence, leave the phone in a warm, dry environment for a few minutes before testing the audio quality. Avoid using a hairdryer (the heat can damage internal components) and avoid sealing the phone in a bag of rice (it's much less effective than air drying and can introduce dust and starch particles).
If the speaker still sounds muffled after 2–3 ejection cycles and a 10-minute dry period, the water may have reached internal components. In that case, professional service is the next step.
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