Speaker Cleaner › Dust Cleaner
Dust mode · 165 Hz pulses, optional 2 to 6 kHzSpeaker Dust Cleaner: shake dust out of your phone
Speaker Dust Cleaner plays short 165 Hz pulses, with an optional 2 to 6 kHz finish on the Extended setting, that make the speaker diaphragm flick back and forth, shaking loose, dry dust off the grille. Hold the phone speaker-down at full volume for a 30-second run. Packed lint doesn't move with sound, so finish with a soft, dry brush.
- No app, no microphone
- Android and iPhone
- Free
Volume to maximum, bottom edge facing down. Dust mode pulses the tone to shake loose, dry dust. Packed lint needs a soft brush.
Standard is the default because low frequencies move the speaker furthest, and that movement is what pushes water out. A 150 to 200 Hz sweep is the range a phone speaker can actually play loudly. Dust mode pulses the same 165 Hz tone.
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Dust mode plays 165 Hz in bursts of about half a second rather than a continuous tone. Dry particles sit on the speaker mesh instead of clinging to it, so the repeated starts and stops shake them loose more effectively than a steady sweep does.
Dust mode also has two profiles. Standard plays 165 Hz pulses for the full 30 seconds. Extended plays 20 seconds of pulses, then a 2 to 6 kHz chirp at a lower level for 10 seconds. Shaking a dry particle depends on acceleration rather than travel distance, and phones play high frequencies far louder than 165 Hz, so the high-frequency finish is plausible for loose dust. It does nothing for water, and we have no measurement proving it helps, which is why Standard stays the default.
There is a physical reason dust and water behave differently. Moving water out of a grille depends on how far the diaphragm travels and how fast the air moves, and both of those fall away as frequency rises. Shaking a dry particle loose depends on acceleration instead, which stays roughly constant across frequency at a given loudness, because the diaphragm reverses direction more often even though it moves less. That is the entire case for the Extended profile's 2 to 6 kHz finish: phones play high frequencies louder than 165 Hz, so the acceleration can be higher up there. It is reasoning, not a measurement, so Standard remains the default.
Why pulses work better for dust
Dust sits on the mesh rather than clinging to it like water, so sharp starts and stops shift it better than a smooth sweep.
| Water mode | Dust mode | |
|---|---|---|
| Signal | Continuous 150 to 200 Hz sweep | 165 Hz bursts, 0.5 s on, 0.25 s off |
| What it moves | Liquid droplets held by surface tension | Dry particles resting on the mesh |
| Why | Steady pumping pushes water out | Repeated start-stop jolts free loose grains |
What dust mode can and can't clear
| What you see | Will sound clear it? |
|---|---|
| Fine grey dust on the grille surface | Yes1 to 3 runs |
| Pocket lint visible in some holes | PartlyRun, then brush |
| Holes packed solid with grime or ear wax | Nobrush packed lint out of the grill |
| Sound crackles even when clean | NoPossible hardware fault |
After a dust cleaning run, brush the speaker grille with a clean, soft, dry brush while the grille faces down. Adhesive putty pressed onto the grille and peeled away lifts the rest. Liquids, pins and compressed air damage the mesh or push debris deeper and should not be used.
When sound isn't enough: a real example
My own Xiaomi 11T had collected ordinary dust over a few years of daily use. Dust mode couldn't shift it, because by then it was packed into the grille rather than resting on it, and I had to clear it by hand with small tools. If a run or two makes no difference, don't keep repeating it: brush the grille as shown below, or follow how to clean the speaker grill safely.
One more thing from my own trials: for dust, the Extended profile (120 to 400 Hz, with a short higher finish) seemed a little more helpful than the standard sweep. It's worth trying if Standard doesn't help. For water, stick with the default, which is centred on 165 Hz.
Speaker Cleaner's Dust mode loosens dry dust resting on a phone's speaker grille, but it cannot remove dust that has been packed into the grille over months or years. Packed dust needs to be brushed out by hand with a soft, dry brush or lifted with adhesive putty.
After the run: brush out the rest
- Power offTurn the phone off so you don't trigger buttons.
- Soft dry brushUse a clean, soft toothbrush or makeup brush. No water or alcohol.
- Brush outwardShort strokes across the grille, phone held speaker-down.
- TestTurn it on and play something. Run Dust mode once more if needed.
To clean dust from a phone speaker, play Speaker Cleaner's Dust mode at full volume with the grille facing down to loosen dry particles, then brush the grille gently with a soft, dry brush. Never push pins, needles or toothpicks into the holes: they can tear the mesh and push dust further in.
Frequently asked questions
How often should I clean my speaker?
Only when it starts to sound quieter or dull. Once a month is plenty for most phones kept in a pocket.
Can I use alcohol or water to clean the grille?
Avoid liquids on the speaker grille. A dry soft brush and adhesive putty are safer.
Is it safe to run Dust mode several times?
Yes. It plays within your phone's normal volume limit, and each run lasts 30 seconds.