The sensor needs to be washed regularly as urine salts deposit on it over time. The sensor should work once you clean it to remove all deposits. Ensure the sensor is dry before reuse. Please follow these steps to clean the sensor.
Disconnect the sensor from the alarm unit by unplugging the plug from sensor jack.

Use soapy water and a small toothbrush to clean the sensor from inside

Shake the sensor to remove excess water.

Wipe with an absorbent cloth to ensure the sensor is completely dry before reuse.

Reattach the sensor to the alarm unit to begin monitoring for bedwetting events again.
