My temperature seems too high

You can follow the troubleshooting steps outlined in this article https://support.withings.com/hc/en-us/articles/221705127-Thermo-I-m-having-issues-with-my-temperature-measurements-What-should-I-do-#toohigh. Hope this helps.

Like I said, I've already read all the instructions and troubleshooting articles. Unfortunately, none of this helped.

Hi, it depends on where you have measured your body temperature before, ie under the tongue, armpit, etc. These measurements will differ as the blood temperature has a slight variation across these areas. If you are now measuring with this thermometer, which measures against the forehead, you need to be aware that the forehead temperature on average is between 0.3 and 0.6 C higher than the under the tongue temperature, where the underarm temperature is about that amount less than the mouth temperature. The veins in the forehead have the least variation in temperature and therefore give the most reliable reading. Mouth and armpit have much higher temperature variation and proves to be less reliable; also depending on what type of thermometer you are using.

I encounter the same problem since years with this device. It constantly shows at least 0.5 Celsius more. I have compared the temperature with other forehead infrared devices, this is a problem of Thermo only. Nothing helps.