Outdoor trash cans often develop a sticky, bituminous film due to residue from waste, heat, and moisture. This not only causes unpleasant odors but also attracts pests. Here are practical ways to prevent this issue:

1. Use Liners: Always line your trash can with durable plastic bags to minimize direct contact between waste and the bin.

2. Regular Cleaning: Wash the bin monthly with a mixture of hot water, vinegar, and baking soda to break down grime.

3. Avoid Oily Waste: Dispose of greasy or oily materials separately to reduce residue buildup.

4. Keep It Dry: Ensure the trash can is dry before placing a new liner to prevent moisture-related film formation.

5. Apply Non-Stick Spray: A light coating of silicone spray on the inner walls can deter sticky residues from adhering.

By following these steps, you can maintain a cleaner, odor-free outdoor trash can and extend its lifespan.