● because it may damage the gums, floss is not unreasonable to put in between the teeth. ● when the yarn is likely to cut or caught in the teeth, because teeth fillings there is also a risk of tooth decay or have taken of, to consult a dentist. ● Store in a location out of the reach of children. ● Because this product is a interdental cleaning tool, not used for any purpose other than cleaning between the teeth. ● During use, discontinue use if you feel any pain or abnormal, consult a dentist. ● place in direct sunlight, not placed in the high temperature of the location. ● The base of the gap of the tooth we recommend the use of interdental brush series of "soft interdental brush," "Dental Dr.".