When using a household thermometer correctly, ensure that it is clean and dry, and check for any damage. For a mercury thermometer, you should grab the end without a metal end, vigorously shake it a few times, and swing the mercury back to the head of the thermometer, so that the mercury scale is below 35 ℃. For electronic thermometers, it is necessary to check if the battery is charged, as insufficient power can affect the measurement results.

The advantages of household thermometers lie in their portability and high-precision measurement capabilities. Due to its small and lightweight size, it can be carried anytime, anywhere and used in different indoor environments, such as homes, offices, schools, etc. At the same time, it can quickly and accurately reflect changes in environmental temperature, thereby helping people monitor and regulate indoor temperature, providing a comfortable and healthy living environment.