How to maintain the accuracy of your Smart Ear

We developed and tested our thermometers for maximum accuracy around typical human body temperatures ranges:

  • Between 95 °F and 107.6 °F
  • Between 35 °C and 42 °C

If you suspect inaccurate readings from your Smart Ear, follow these steps:

  1. Ensure the ear is clear of earwax and debris, but don't use a cotton swab because this can damage the ear. For tips on how to best clean the ear safely, please follow this guide from the Mayo Clinic.

  2. This step is very important - do not skip. Make sure the tip of the Smart Ear thermometer is clean. Using a cotton swab with alcohol or an alcohol wipe, gently clean the small round window at the tip of the sensor. If there is any debris left on this sensor window at all, it will throw off readings. (see photo below)

  3. Before taking a reading, choose one ear to use for readings and stick to it. It may sound strange, but actually there is a small temperature difference between both sides of the head and so choosing one ear to use with your Kinsa will produce more precise readings.

  4. The Kinsa Smart Ear uses an infrared ray to measure the temperature inside the ear, and so earwax or a small, curved ear canal can interfere with the accuracy of a temperature reading. To ensure the most accurate reading possible, please use the proper technique:
    • For infants under the age of 1, gently tug the ear straight back to straighten the ear canal before taking a reading.

    • For children over the age of 1 and adults, gently tug the ear straight up and back before taking a reading.

  5. If you're still seeing inaccurate readings, try removing the batteries for one minute and then reinserting them. This will allow the Smart Ear’s internal components to reset which can fix accuracy issues.
  6. If all else fails, perform a factory reset on your Smart Ear by holding down the large power button and the small button on the left side for about ten seconds. You should hear two beeps several seconds apart. When you see the flashing Bluetooth symbol on the LCD display, your Smart Ear has been successfully reset. Then wait a few seconds more to let it power all the way off before you attempt to turn it on again and take a new reading. (Note: Since the Smart Ear has now been factory reset, you will need to pair it with your phone again.).

The acceptable range of temperatures with the Kinsa Smart Ear is 0.8 F. If you're still seeing a bigger range than this with your readings, please tell our Customer Happiness Team right away at and we'll take care of you!





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