Dyson CameraJet review: This game-changing toothbrush offers liquid flossing, precision-brushing and

Dyson CameraJet review: This game-changing toothbrush offers liquid flossing, precision-brushing and a camera that doubles as a dental endoscope — I tried it for a week

The live-streaming Dyson CameraJet toothbrush is stuffed with gadgets and works a treat — but be prepared to pay a premium.