After three months of normal use, bristles exhibit fatigue and brush heads are less effective at removing plaque.
Even the extra soft bristles in Sonicare brush heads must maintain a certain amount of stiffness to effectively remove plaque. Studies show that bristles begin to lose their stiffness due to splay and fatigue after three months of normal use, even though these changes are only visible with a microscope.
Our reminder bristles are designed to give you a visual indication of this microscopic breakdown, letting you know when it’s time to replace your brush head. If you use your brush head twice a day for the full two minutes, it needs to be replaced every three months. Tip: Replace your brush head when the seasons change.
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