I used Philips' AI toothbrush for a week. Is it worth $400?
- Posted on September 28, 2026
- By Detroit Free Press
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- 1 min read
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I used Philips' AI toothbrush for a week. Is it worth $400?
The Philips Sonicare DiamondClean 9900 Prestige offers personalized brushing feedback, adaptive cleaning and premium extras. Here's what stood out.