San Francisco's #1 problem might be solved with pee-resistant paint

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San Francisco is testing the idea of painting walls with urine-repellant paint that will soak the sprayer before the wall gets wet.

Mohammed Nuru, San Francisco's director of public works, got the idea to use the paint, Ultra-Ever Dry, after reading about its effectiveness in Hamburg, Germany. The paint repels most liquids so the urine would "bounce back" on the sprayer.

"The urine will bounce back on the guy's pants and shoes," Rachel Gordon, a public works department spokeswoman, said. "The idea is they will think twice next time about urinating in public."

After painting nine walls around areas with prominent nightlife or homeless communities, the city has received requests many other requests for the paint. In fact, it costs less money to paint the wall than to clean it, Gordon said, according to The Guardian.