1. The thermometer should be washed before and after use, preferably with an antiseptic solution.
2. Jerk the thermometer a few times to bring the level of the mercury down.
3. Before use, the mercury level should be below 35°C or 94°F.
4. Do not hold the thermometer by its bulb.
5. Keep the mercury level along your line of sight and then take the reading.
6. Handle the thermometer with care. If it hits against some hard object, it may break.
7. Do not place the thermometer in a hot flame or in the hot sun.
