Framed teal sign showing a cartoon alligator washing its hands at a sink, at Cozy Royal in Brooklyn

Cozy Royal, Brooklyn, NY

Pink cursive letters mounted on a dark green bathroom wall, reading “Employees must wash hands”

Unknown, Brooklyn, NY

Engraved black sign on a Brooklyn bathroom door covered in graffiti, stickers and a painted blue smile

Unknown, Brooklyn, NY

Black sign on a yellow wall with a sticker below it reading “And you probably should too”

Unknown

Black sign with a hand-washing pictogram on white subway tile at NADC Burger in Manhattan

NADC Burger, Manhattan, NY

Handwritten sign in a stone frame above a brass faucet at Levantine in Brooklyn

Levantine, Brooklyn, NY

Small sign beneath a round mirror in an ornate gold frame, reflecting the photographer, in Brooklyn

Unknown, Brooklyn?, NY

Worn white sign with black serif lettering on a painted brick ledge at Father Knows Best in Brooklyn

Father Knows Best, Brooklyn, NY

Vintage orange Yardley English Lavender soap card carrying the sign text, at Tabaré in Brooklyn

Tabaré, Brooklyn, NY

Small red and silver “Employees Must Wash Hands” plate on cream tile at a Broadway theater

Broadway Theater, Manhattan, NY

Sign at Hole in the Wall in Brooklyn adding “but we think you should too”, beside a no smoking sign

Hole in the Wall, Brooklyn, NY

Brushed steel sign on grey hexagonal mosaic tile above a marble sink at Mission Ceviche in Manhattan

Mission Ceviche, Manhattan, NY

Black sign on a red wall above a stainless steel soap dispenser at Gonzalez y Gonzalez in Manhattan

Gonzalez y Gonzalez, Manhattan, NY

Sign printed on a sticker-covered hand dryer against a graffitied brick wall at Father Knows Best

Father Knows Best, Brooklyn, NY

Yellow New York State Department of Health placard taped to a painted wall, listing when employees must wash hands

Unknown, NY