[. . . ] EFFECTIVE CLEANING of gums and between the teeth is ensured by longer outside bristles on the circular brush head. [. . . ] Cleaning your teeth regularly, morning and evening, like this prevents build-up on the teeth and keeps teeth and gums healthy. For the first few days of use the toothbrush may cause some bleeding of the gums. This only lasts until the gums get used to the oscillating movement of the brushhead. If this bleeding continues for more than two weeks, then you should consult a dentist. After brushing the teeth switch off the toothbrush using bottom part of the switch "0" and only then take the brush out of your mouth. Then clean the brushhead and the handle thoroughly with the toothbrush switched off. To ensure that the toothbrush maintains its cleaning performance, we recommend that the brushhead is changed every three months and certainly by the time the bristles start to weaken (G). If you find you have to change your brushes more often than every three months, then you are using too much pressure when cleaning your teeth. [. . . ] Guide the brush from one tooth to the next over the space between the teeth. [. . . ]