Dyson Won't Say What's Wrong with Its CameraJet Toothbrush (wired.com)

I mean, the obvious answer is that it's an absolutely stupid idea that by all accounts often fails at its one special trick and fundamentally can't operate without making a mess. If you want a water flosser, just get a water flosser. Don't rely on microchip-AI-based optical targeting inside a mouth filled with toothpaste and saliva.

Oh, you meant why they're leaking and dying. Right, right.