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I’ve always thought it was disgusting that I’m raising / lowering my hands into a narrow slot where I’m bound to touch the sides - sides where others (who might’ve washed their hands less well) have also been depositing a germ factory.

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I’m sure mold grows in there because of the constant dampness. You can’t avoid touching the sides because the airflow is so strong and kind of forces it.

In the old days there was a multiple use towel than hung out of the dispensers and just circulated back in. Yuck.

https://collegeofcuriosity.com/2-18-restroom-evolution/

It was actually a roll of clean towel mechanically linked to a pickup roll of used towel, but it's much bulkier than paper towels so it faded away.

In many ways it's very similar to the change from cloth diapers to disposables.

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