Your Kenek Sensor is not water proof. Never immerse the sensor in liquid. 

Clean the sensor whenever it is dirty. Even if the sensor does not appear to be dirty, it should be cleaned at least once a month to maintain accurate readings.

  1. Disconnect the sensor from the Apple mobile device.
  2. Wipe the sensor with 70% isopropyl alcohol pad, while being careful to not soak or immerse any portion of the sensor with the liquid solution.
  3. Do not repair, open, disassemble or modify the sensor while cleaning.
  4. Allow sensor to dry prior to using.

Apple provides instructions to clean their products. Find cleaning instructions for your device here -