Wash a hard-sided cooler with mild soap and warm water, use a baking-soda-and-water mixture for tougher stains, and rinse and dry it completely before storage. For persistent odors, follow the care instructions for your exact cooler: Coleman and Igloo describe bleach-based treatments, but RTIC cautions against chemicals.
Clean routine dirt with soap and warm water
- Empty the cooler and remove loose debris.
- Wash the interior and exterior with mild soap and warm water using a cloth or sponge. Coleman recommends this routine cleaning, and RTIC recommends washing its hard coolers after each trip. Coleman’s cooler use and cleaning guide; RTIC’s hard cooler care instructions.
- Rinse away soap and wipe off any remaining residue.
Remove tougher stains with baking soda
For a stubborn mark, mix baking soda with water and clean the affected area. Both Coleman and Igloo recommend this approach for tougher stains. Rinse the area thoroughly afterward; Igloo advises rinsing cleaning agents off and completely drying the cooler before storing or using it. Igloo’s product FAQ.
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Treat persistent odors according to the cooler maker
Odor treatments are not universal. Check the care instructions for your cooler’s make and model before using bleach or another chemical. Coleman and Igloo offer bleach-based odor guidance, while RTIC cautions against chemicals in its hard-cooler instructions.
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Coleman suggests using a diluted chlorine-bleach solution for odor. If the odor remains, its guide suggests leaving a cloth saturated with vanilla extract in the cooler overnight. Follow Coleman’s instructions for your specific cooler. Coleman’s cooler use and cleaning guide.
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Igloo guidance
Igloo says to wipe the interior with bleach while wearing gloves, rinse it thoroughly, and dry the cooler open in direct sunlight. For hard-to-remove odors, Igloo also suggests leaving a vanilla-extract-soaked paper towel inside overnight. Follow its instructions for your cooler. Igloo’s product FAQ.
RTIC guidance
RTIC’s hard-cooler instructions caution against chemicals. Do not use a bleach treatment on an RTIC hard cooler contrary to its care guidance; use the routine soap-and-water cleaning and check the manufacturer’s instructions for the appropriate next step. RTIC’s hard cooler care instructions.
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Rinse, dry, and store with airflow
After cleaning or odor treatment, rinse away the cleaning agent as directed and let the cooler dry completely with the lid open. For long-term storage, RTIC says to keep the lid slightly open or propped. Igloo advises leaving a hard cooler’s drain plug open so trapped moisture can escape. Avoid sealing the cooler while it is damp. Igloo’s product FAQ; RTIC’s hard cooler care instructions.
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