1. Choose an appropriate route (oral, axillary, rectal). 2. Leave the thermometer in place for the length of time appropriate for the route. 3. After removing the thermometer, use care not to clean with alcohol before reading it, but wipe it with a tissue instead. (The thermometer should be thoroughly cleaned after recording the number). 4. Hold the thermometer at eye level, slowly rolling it between the thumb and forefinger until a colored line appears and focus on where the line stops. 5. Read the temperature to the closest line and record.