Starting about a week ago, the latch on my back door knob won't retract into the doorknob unless I turn the doorknob. This means to close my door properly I have to unlock the doorknob, turn it, close the door, then lock it again.
If I try to just close it, the latch won't retract and just bangs against the door frame. If I try to push the latch closed with my hand, it (mostly) won't budge. If I fiddle with it enough, I am able to push it in, but usually this doesn't work.
Is this just a possible issue that lubrication will solve? Or am I looking at replacing my doorknob/lock?