Specifically, what are they dyed with / what are they made of that it fades over time? Does the color/material leach into your mouth?
In: 161
Not OP, but I have a follow-up question: if the bristles of my toothbrush look worn out well before the blue colour is gone (and well within 3 months of using, which do I trust? The colour that says “we’re still good”; the general advice that says “change every three months”; or the bristles that say “please let me die in peace”…?
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