1. The optimum water temperature should be maintained at 37°C ± 2°C (98°F ± 4°F).
2. Safe age is 12 years or older, children under 12 years old should consult a doctor.
3. Never use this product if you have an ear infection, a hole in the eardrum, blood in your ear or any form of damage to your ear.
4. If you feel any pain during use, please stop using immediately.
5. Users using the product for the first time, please approach the ear canal carefully and slowly.