It may seem harmless, but those little stickers you find on fruits and vegetables can wreak havoc on drains and at wastewater treatment plants. Before washing fruits and veggies, take the time to remove the stickers and put them in the trash. When they accidentally get washed down the drain, their adhesive can stick inside drains and pipes. If they get past that point, they get caught in screens and filters at water treatment plants. It may not seem like a big deal, but if you think about the amount of produce that's stickered, it adds up.