Gas smell
 

Ever since I got the car about 5 months ago, every once in a while I'll smell gas inside the car. I checked all the fuel lines, fittings, and saw nothing. I did find that the smell is coming from the back of the car once I open the hatch. It's not all the time tho, just once in a while. Any ideas?

it could be from the evap canistor back there, its under the car either near or attached to gas tank.

would it need to be replaced if it's that? I'm pretty sure they can't be cleaned out. I could be wrong tho.