Have a stinky drain and 15 minutes to spare? Then you’re just a few steps away from a fresh-smelling sink. First, turn your garbage disposal OFF. Then pour 1 cup of ARM & HAMMER™ Baking Soda down the drain and let it sit for 15 minutes to eliminate those nasty, lingering odors. Lastly, run hot water and scrub the drain guard with a brush. That’s how you wash bad odors down the drain.