The blue bristles indicate the level of wear. After three months of regular use, the blue bristles will fade and you will know it is time to replace them. Blue bristles are used on the K-series, Compact-series, T-series, UV-series (except ForKids).
What are the blue bristles on the brush heads used for and which brush heads have them? Print
Modified on: Wed, 16 Nov, 2022 at 4:26 PM
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