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>It's dangerous at its intended purpose, making it worse-than-useless.

You can't authoritatively say this until you have done a thorough cost analysis.

Tens or hundreds of millions of people around the world own these sort of brushes and they're very useful and effective for cleaning. I would not be surprised if their utility exceeded the cost of a few GI injuries a year. To be clear, I wouldn't be surprised the other way either.




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