How do I get rid of odors in a cooler?

Scrub every surface with a baking soda paste (3:1 baking soda to water), let it sit for 15 minutes, then rinse. Vinegar helps cut grease but won’t neutralize odors alone. Wipe dry and leave the cooler open in the sun for a full day. Don’t skip the drain plug, and if odors linger, the plastic has absorbed the smell permanently.