iHealth PT3 is a precision instrument. The product should be placed in its original packaging after each use for proper storage. To ensure accurate measurements, avoid contact with any liquid or droplets and keep tiny particles (such as dust or powder) from falling into the probe. To clean the thermometer probe, gently swipe the probe using a cotton swab dipped in 75% alcohol. Let the cleaned thermometer sit for at least 15 minutes before taking measurements.