Check that the thermometer lens is perfectly clean. If in doubt, clean it with a cotton swab lightly moistened with alcohol. After cleaning, wait 30 minutes before measuring again. (See iHealth PT2L - Lens Cleaning).
Make sure the subject's forehead is free of sweat, cosmetics, dirt or excess oil before taking a measurement.
Make sure the user and the thermometer are at the same room temperature for at least 30 minutes prior to measurement.
Hold the thermometer in position throughout the measurement. Do not move the thermometer until you feel the vibration that signals the end of the measurement.
Do not take a measurement during or immediately after breastfeeding a baby.
Users should not drink, eat or be physically active 30 minutes before or during measurement.
Remove anything that may cover the head (hat, bonnet, cap...) and wait 30 minutes before taking a measurement.
Before taking a measurement, make sure the forehead is clean. Wait 30 minutes after cleaning the forehead before taking a measurement.
Always take the temperature exactly as indicated. Temperature results may vary if measurements are not taken on exactly the same area of the forehead (in the center of the forehead).