A how-to guru advises readers on repairing misbehaving doors, as well as a solution for cleaning old wallpaper. Q Three interior doors are out of plumb. One swings closed unless it’s more than halfway ...

When a door latch won’t catch, it’s because the latch doesn’t align with the hole in the strike plate. Sometimes you can clearly see the misalignment. If not, do the “lipstick test.” Smear lipstick on ...