That's a great question! A leaky outdoor trash can is a real nuisance, attracting pests and creating a smelly, sticky mess. After years of trial and error, I've found a method that works consistently.
First, choose the right bags. Don't skimp—use heavy-duty, leak-proof trash bags designed for outdoor use. Look for keywords like "contractor bags" or "extra strong." They are thicker and more puncture-resistant.
The core strategy is double-bagging. Place one heavy-duty bag inside the can. Then, add a second bag, but *twist it once* before draping it over the rim. This creates a simple seal that helps direct liquid into the inner bag. For messy waste like food scraps, consider putting those items in a smaller, separate bag (like a grocery bag) and tying it shut before placing it in the main liner.
Secure the liner properly. After both bags are in, pull the outer bag's edges firmly over the can's rim. Avoid overfilling the can, as this puts stress on the bags and causes tears. Leave some slack so you can tie the bags closed easily.
Finally, keep the can itself clean. Even with good liners, give the empty can a rinse with a hose and a mild disinfectant every few weeks to prevent residue buildup and odors. Placing a brick or a layer of dry leaves at the very bottom can also help absorb minor condensation.
This simple system of using strong bags, double-lining, and proper maintenance will save you from most leaky disasters.