Outdoor trash cans often develop a sticky, bituminous residue over time due to heat, decomposing waste, and chemical reactions. To prevent this issue, follow these practical steps:

1. Regular Cleaning: Rinse the trash can weekly with a high-pressure hose or scrub it with a mixture of warm water and dish soap. For tougher buildup, use baking soda and vinegar.

2. Use Liners: Always line your trash can with durable plastic bags to minimize direct contact with waste liquids.

3. Avoid Oily Waste: Dispose of cooking oils and greasy materials separately, as they contribute to sticky residue.

4. Apply Non-Stick Spray: Lightly coat the interior with a food-safe silicone spray to create a protective barrier.

5. Keep Lids Closed: Prevent rainwater and sunlight from accelerating decomposition by securing the lid tightly.

By implementing these measures, you can maintain clean, odor-free trash cans and avoid the hassle of stubborn bituminous residue.