The great printer rip off: It costs more than vintage champers – and devious new tricks mean you constantly have to buy refills

Colgate Plaqless Pro The toothbrush that tells you when your mouth is clean Sarah Tew/CNET Smart toothbrushes are all about coaching you through each brushing session to get your mouth as clean as possible. What makes Colgate’s Plaqless Pro brush stand out is a sensor right below the bristles that looks for Xerox Inkjet Cartridges plaque and know when it’s gone as you brush.

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