•  Get the lead in

Forget about oil, which can do more harm than good to a stuck lock. The best lubricant for a lock’s inner mechanism is graphite, and a good source of graphite is pencil lead. Rub a sharpened, soft lead pencil (B or HB) repeatedly against the matching key, then insert it several times into the lock. Perform this trick twice a year to keep locks in top working condition.

  •  Remove a broken key

It happens all the time: keys get old and bent and end up breaking off inside the lock. If you can’t enter your house or flat through another door, go to a neighbour to borrow a couple of items before calling a locksmith. First, try removing the broken piece with tweezers. If that won’t work, apply a tiny drop of Superglue to the end of the piece that’s still on your key chain. Line it up with the part inside the lock, and carefully insert it. Hold it in place for 40-60 seconds and then slowly pull out the key.

  •  Light up your lock

To solve the problem of having to come home to a dark verandah, then feeling around for the lock on your front door, dab a few drops of luminous paint around the keyholes of your exterior locks using a cotton bud or small paintbrush. Do the same for any locking bolts on the inside of your house as well, which will make exiting much easier in the event of a power failure, fire or other emergency.

  •  Polish a loose doorknob

A wobbly doorknob is often the result of a loose setscrew (a tiny screw found on the doorknob shank), which keeps the knob firmly in place on the spindle. Everyday usage can cause setscrews to become loosened, but you can keep them in place by brushing a little clear nail polish onto each screw after you have tightened them.

  •  Pamper a noisy hinge

Is a squeaking door hinge making you feel unhinged? A few drops of baby oil applied around the pin should solve the problem. When you can’t find any baby oil and you are out of WD-40, a bit of cooking spray, petroleum jelly or even shaving cream could also be used to silence a squeaky hinge.

  •  Re-fix a hinge screw

A loose hinge will cause a door to stick or become difficult to open or close. Tightening the hinge screws usually solves the problem, but if an undamaged screw won’t grip, it means the hole has become worn.

To fix it, slide a magazine or two under the opened door to prop it up, if necessary, and then remove the screws from the loose side of the hinge so that it can be folded back. Loosely fill the screw hole with wooden toothpicks or matchsticks that have been dipped in some woodworking adhesive. Keep them flush with the frame by trimming off any protruding ends with a utility knife. When you screw back the hinge, the extra wood should hold the screw firmly in place.

  •  Pop goes the rusted bolt

Loosen a rusted bolt by rubbing it with a few tablespoons of a fizzy drink.

  •  Unstick a stuck door

If a door sticks because it rubs against the floor or threshold, try this simple fix. Gaffer-tape all four edges of a coarse sheet of sandpaper to the floor where the door rubs, then open and close the door back and forth over the sandpaper until it swings smoothly.

A door that is sticking in its frame (because of too much painting or because it has swollen) can be cured by using an electric plane, hand plane or belt sander to remove the high spots from the door where it is binding. Re-paint after removing the offending wood.