We have an interior door that should always be kept closed. I installed a self-closing hinge, and when you let the door go it gently swings shut. Instead of latching, though, it hits the latch (not sure if that’s the right name, it’s the sloped bit that protrudes from the door and catches in the jamb’s door-hole) and gets stuck ajar. I added a second self-closing hinge, and now the door closes strongly but is still thwarted by the latch. The latch compresses a bit, starting to slide into the door, but then stops it from closing.
It’s not particularly strong compared to other doors in the house. I’ve hit it with both WD-40 and graphite, but nothing changed—it’s not sticking or stiff due to friction, it’s the spring that’s keeping it open.
Is there a way to get to the spring? Do they make basic, interior doorknobs that close easier than others? Should we just abandon the basement and nail the door shut?