Troubleshooting My Philips Avent Soother thermometer is broken In the unhappy event that your Philips Avent soother thermometer is broken, you must stop using the product immediately. Find out what to do if you have a broken thermometer. Discard the soother thermometer Do not use cracked parts. The battery of the soother thermometer cannot be replaced. If the battery is empty or parts are cracked, discard the soother thermometer.