The Quadrant Method of brushing is visually dividing your top and bottom arches (see the manual for an illustration) into four quadrants:

  • Upper-Left
  • Upper-Right
  • Lower-Left
  • Lower-Right

Start with one quadrant and switch every 30 seconds—the Sonic-FX™ will notify you with a unique pause in the vibration letting you know it's time to switch. Total brushing time of all quadrants is two minutes and the Sonic-FX™ will turn off automatically.