Confused language?
My cupboards contain floor cleaners, stove cleaners, glass cleaners and other cleaners. A vacuum is free from any contanimants and does not need cleaning. Why would I need a vacuum cleaner? The Dyson cleaner relies on suction, it creates lower pressure, far from a vacuum.
Marketing is seldom about being accurate.
Try typing "hoover' into
www.dictionary.com
"aspirin" does reveal it was once a trademark, 'biro' does not even mention Mr Biro or tradename. Xerox have fought against becoming a verb for decades.
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