Spring Fever: The best way to get rid of the trash can smell? Get rid of it from the source. Be more prudent with your waste materials. Put things away as soon as you're done using them. Throw things away as soon you know you won't use them. Everyday maintenance is the key to a breathable, livable home.
Charcoal: Charcoal is on the top of the list of smell deodorizers as it is one of the best absorbent agents that can soak up the bad odor. Charcoal is also widely used as water filters and in most odor-removing commercial products. You can put a medium-sized chunk of charcoal inside your smelly patio for instance, and leave it there for a couple of days. You will notice that it can effectively remove the trash can smell.