We spilled a carton of milk in the trunk of our 2007 Mitsubishi Outlander and I want to remove the carpet to clean it out properly. I've figured out everything except for the section that tucks under the plastic piece at the base of the tailgate. I'm sure that piece comes off somehow, but I don't want to just start pulling and break it. Can you help me?

In the body shop that was just about what we would have to do when there are no visible screws and it was the first time removing a panel in a new type of vehicle.

Those panels are usually held in place with some metal clips (sometimes plastic molded into the panel) that snap into slots in the body. You can lightly pull and get a feel for where there is reistance. Slide a thin tool like a paint stick (or something stronger) and use it to pry up in the area of resistance. You may also be able to pry up and look under it to see where the clips are.