Trash bins can smell awfully - not only when they're full, but also just because they become dirty over time.
To fix that, you should not only replace trash bags, but also clean the bins themselves.
Now, let's find out how to do it properly.
The bin should be empty
First, take out all the trash and dispose of it.
Clean it properly
Wash the inside of the bin with warm, soapy water. You can use a brush or sponge to scrub away any residue or sticky spots.
Use water a lot
Rinse the bin thoroughly to remove all the soap.
Let it dry
Let the bin air dry completely. You can also use a clean towel to speed up the process.
Baking soda can help
Sprinkle some baking soda (about a tablespoon) at the bottom of the bin. Baking soda helps absorb odors.
Use a clean trash bag
Place a new trash bag or liner in the bin. This will help keep it clean and fresh.
Liquids don't belong there
Try not to let liquids or food scraps leak into the bottom of the bin. Double-bagging especially messy items can help prevent leaks.
Do it regularly
To prevent future odors, clean your trash bin regularly, especially after throwing away particularly smelly items.
That's it - you got rid of the awful smell! Do it weekly, and the smell won't bother you any more.