The rule is every...: 6 months or sooner. Especially if you experience cold or flu symptoms in between. I prefer to change every 3 months so you are right in the window between 3 and 6 months.
Answered 7/10/2015
3.3k views
Yes,It's ok.: Replace your toothbrush about every 3 to 4 months, or when it shows signs of wear. Frayed bristles will not clean the teeth and gums adequately. Toss toothbrushes after illness.
Answered 6/10/2017
3.3k views
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