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During the pandemic, as people sought to protect themselves from Corona Virus, more and more products entered the market claiming to use Ultra Violet light to clean your belongings. These vary from UV wands and lamps, to phone boxes and UV baby bottle sterilisers.
You may have seen them advertised online, claiming to kill 99% of viruses and bacteria.
But do they deliver, and are they worth it, compared to more traditional methods of cleaning like alcohol wipes, or soap and water...
That's what listeners Chris and Ben wanted to know.

I'll be finding out by speaking to an expert in radiation safety Professor John O'Hagan at Loughborough University and Matt Knight, Product Testing Expert at the consumer group Which?

Once again this series we鈥檙e testing and investigating your suggested wonder-products, so if you鈥檝e seen an ad, trend or fad, and wonder if there鈥檚 any evidence to back up a claim, drop us an email to sliced.bread@bbc.co.uk or you can send us a voice note to our WhatsApp number: 07543 306807

PRESENTER: Greg Foot

PRODUCER: Jay Unger