Use the guided tester to record observations. Browser response measurements are not hardware latency or true USB polling-rate measurements.
Open the controller tester →Separate the physical feel from the reported input
A sticky button, a missed game action and a duplicate input are different observations. Describe what your finger feels and what software reports before assigning a cause. A browser trace cannot identify a damaged membrane or dirty contact by itself.
Check presses and releases
Use the button view with the intended controller selected. Press and release one control at a time and repeat several times. Record whether the indicator remains active after release, misses a press or behaves inconsistently.
A flicker might justify investigation, but it is not proof of dirt. Likewise, repeated game actions are not proof of a torn membrane. Compare another supported application and check for duplicate mappings or virtual controllers.
Check trigger travel separately
For a standard-mapped device with analog triggers, compare the released value with a gradual press and full press. Some controllers expose digital controls or non-standard mappings. Do not apply an analog travel expectation to an unsupported layout.
A result that looks wrong only in one game may involve that game’s settings. A browser can help document the symptom but cannot establish which internal part needs replacement.
Use the manufacturer’s cleaning guidance
Power off and disconnect the controller before cleaning, and follow the exact model’s manual. Sony’s DualSense instructions specify a soft, dry cloth for routine care. Do not apply a universal alcohol-flooding procedure to every controller.
This guide has removed the earlier instructions to work liquid into button gaps and operate the button while wet. It also does not recommend lubricant, graphite or glue without a verified model-specific service procedure.
When to request repair
If a control sticks physically or remains unreliable across supported environments, document the result and check warranty or repair options. Model-specific service evidence should determine any part replacement. A squeak alone does not identify a snapped spring, and no fixed percentage of faults can be attributed to dirt from these observations.
Sources and next steps
Test button presses and releases
Check supported analog triggers
DualSense care and cleaning manual
Try the relevant check and compare your observations with the guidance.
Stick movement · Buttons · Triggers