You had a great day trip, packed a great lunch and got home late. So late that you didn't bother to clean out the cooler. Now the cooler has a distinct smell. Not to worry, a mixture of one quart hot water, 1/4 cup white vinegar, and two tablespoons of baking soda will take care of it. Just scrub down every surface with a sponge, rinse with clean water, and let air dry. Now your cooler is ready for the next adventure!