Watch | Seattle’s famous ‘gum wall’ to be cleaned after 20 years

After 20 years of people sticking their gum to the walls of an alley by Seattle's Pike Place Market, officials say it's time for a cleanup.Pike Place Market announced this week, it's taking down the estimated 1 million pieces of gum off the walls of Post Alley.Known as the “gum wall,” the sticky landmark has become a popular attraction to visitors and locals.The Market has hired a contractor that will use steam to melt off the pieces of gum. Pressure washing, they said, damages the historic building too much.