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Use baking soda and water to remove tough stains. Remove odors with a diluted solution of chlorine bleach and water. If odor persists, wipe interior with a cloth saturated with vanilla extract, then leave in cloth in cooler overnight. Always air dry with the lid open before storing. Cooler Tips and Advice Using two coolers is the best arrangement. Use one for beverages that will be opened more frequently and one for foodstuffs that will be opened less often. Food will stay fresh much longer