If you make doorknobs out of brass, they might still get poop on them, but many types of bacteria and viruses can’t survive. https://en.wikipedia.org/wiki/Antim

If you make doorknobs out of brass, they might still get poop on them, but many types of bacteria and viruses can’t survive. https://en.wikipedia.org/wiki/Antimicrobial_properties_of_copper https://en.wikipedia.org/wiki/Antimicrobial_properties_of_co... Maybe we can start making public touchscreens out of brass...