stephan d (USA)
Clean-hands faucet
My idea is to have a dual station faucet knob. On faucets that have two knobs, they could be replaced with two two station knobs. A person could prevent cross-contamination by turning the faucet on (with dirty hands) with one (probably the lower) set of knobs, wash, then turn the faucet off with the uncontaminated upper set. On faucets that have only one knob, replace it with one with two stations.

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