> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sophiabarnes.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Fix inaccurate readings

> Diagnose and correct soil moisture readings that look too high, too low, or stuck.

If a sensor's moisture percentage doesn't match what you see in the soil, work through the checks below. Most accuracy problems come from probe placement or a calibration that no longer matches the soil.

## Readings look too low (always near 0%)

* Push the probe deeper so the moisture contacts are fully covered — exposed contacts read as dry air.
* Confirm the soil isn't pulling away from the probe after drying out. Press the soil back around the probe.
* Re-run the wet point in [Calibrate a sensor](/mintlify-demo/v1.1/sensors/calibrate-a-sensor) after watering.

## Readings look too high (always near 100%)

* Make sure the probe isn't sitting in a pocket of standing water at the bottom of the pot.
* Check drainage — a pot without drainage holes stays saturated and reports high indefinitely.
* Re-run the dry point in [Calibrate a sensor](/mintlify-demo/v1.1/sensors/calibrate-a-sensor) with the probe clean and dry.

## Readings are stuck or not updating

* Confirm the sensor is still reporting on the [soil moisture dashboard](/mintlify-demo/v1.1/soil-moisture-dashboard) — a stale timestamp points to a connectivity issue, not accuracy.
* Verify the sensor is well matched to the pot size. See [Sensor types](/mintlify-demo/v1.1/sensors/sensor-types) for probe-length guidance.

<Note>
  Still off after recalibrating? The probe contacts may be corroded. Wipe them with a dry cloth, and replace the sensor if a thin film remains.
</Note>

## Related

<CardGroup cols={2}>
  <Card title="Calibrate a sensor" icon="sliders" href="/mintlify-demo/v1.1/sensors/calibrate-a-sensor">
    Reset the dry and wet reference points.
  </Card>

  <Card title="Sensor types" icon="layer-group" href="/mintlify-demo/v1.1/sensors/sensor-types">
    Match the probe length to your pot.
  </Card>
</CardGroup>
