That's a great question! A smelly outdoor bin is a common headache, but thankfully, it's a problem with some straightforward and often natural solutions. The best approach combines a deep clean with preventative habits.
First, tackle the source with a thorough cleaning. Empty the bin completely. If possible, take it to a driveway or grassy area. Hose it down to remove loose debris. Then, create a powerful, natural deodorizer: sprinkle a generous amount of baking soda into the bottom, followed by a cup or two of white vinegar. The fizzing action helps break down grime and neutralize odors. Let it sit for 15-20 minutes. For stuck-on gunk, use a long-handled brush with warm, soapy water. Rinse thoroughly and let it dry in the sun, which is a natural disinfectant.
For maintenance, prevention is key. Always use sturdy trash bags and tie them securely. Sprinkle a layer of baking soda, cat litter, or even dried coffee grounds at the bottom of the bin before inserting a new bag to absorb future moisture and smells. After taking out full bags, give the empty bin a quick rinse if you can. For persistent odors, place a few charcoal briquettes (the plain kind for grilling) in a mesh bag at the bottom—they are excellent odor absorbers. Also, consider placing a few dryer sheets or citrus peels (like lemon or orange) in the bottom for a fresh scent.
Finally, keep the lid tightly closed to deter pests and contain smells. If your bin is old and retains smells in the plastic, a periodic wash with a diluted bleach solution (1 part bleach to 10 parts water) can help, but rinse well afterward. With these simple steps, your outdoor space will stay much fresher.