When brushing with an electric toothbrush, pressing hard is not needed. The goal is to simply guide the brush along the teeth while it provides the brushing action. Some electric toothbrushes have sensors that will notify the user when too much pressure is exerted on the tooth.
Start with the outside surface of the teeth.
Guide the head of the brush slowly from one tooth to the next and hold the head of the brush for a few seconds against the tooth.
Follow the shape of the tooth.
Use the same motion on the inside surface of the teeth and move to the chewing surfaces.
Next, go along the gum lines, making sure not to press hard.
Lastly, use the brush along the tongue and the roof of the mouth to help freshen breath.
It is recommended that the directions are followed that come with the electric toothbrush to ensure proper tooth care.