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These brushes seem to benefit from the halo surrounding ultrasonic cleaning, which is a real thing used on small, delicate items like jewelry and dentures.

So, sonic, when attached to face brushes and toothbrushes, is not advertising that ultrasonic cleaning technology; it just means “it vibrates rapidly.”

If yours are beyond home rescue, consider a professional ultrasonic cleaning.

The banking company is offering customers ultrasonic cleaning machines and cleaning solutions for free to help them salvage coins and jewelry.

Alongside the usual food and household goods Aldi has a regularly changing array of bargains – as one reader said during our Store Wars series: "One week they're selling tents, another DAB radios, another ultrasonic cleaning baths".