Scrub with the hairs of the brush under an angle of 45 degrees in the direction of the gums
Interdental cleaning:
Use floss, a toothpick or interdental brush to clean in between your teeth before you go to bed
Floss:
Keep a short thread of floss between your indexfingers and ...
... move it up and down and back and forth over the side of the teeth to clean where the brush can't come
( you need to bend the thread around the side of the tooth)
Toothpick:
Thrust along the sides of the teeth and move back and forth
Interdental brush:
Only works when there is enough space between your teeth ...