Empty the trash can and take it outside.
Spray out the can thoroughly with a garden hose.
Mix 2 cups of bleach and 1 gallon of water into the can and let it sit for 15 minutes.
Pour out the bleach solution and spray the can out again with the hose.
Scrub the can with your scrub brush.
Place the can upside down to dry completely and check to see if the smell is gone.
Mix 2 cups of vinegar and 1 gallon of water into the can and let it sit for at least an hour.
Pour out the liquid and scrub the can out again.
Let the can dry and then cover the bottom with 1 cup of baking soda.
Place a layer of freshly cut grass clippings on top of the baking soda and let the can sit outside for the afternoon.
Rinse out your can, scrub it again and let it dry.
Check to make sure the smell is gone.
Place a layer of charcoal briquettes on the bottom of the can. You can now bring it back inside and begin using it normally. If the odor continues, it may be time to purchase a new trash can.