Oral-B's iO9 is both Comically overengineered and the next gen of electric toothbrushes. But is it worth £250? GQ tested it to find out
Oral-B's iO9 is both Comically overengineered and the next gen of electric toothbrushes. But is it worth £250? GQ tested it to find out
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Oral-B iO Series 9 Review
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