What to Do if Your Lock Is Sticking

Sticking lock or key?

Locks get a lot of use, and over time it’s not unusual for them to start sticking. A sticking lock doesn’t always mean it’s broken - in many cases, it’s something small that can be fixed with a bit of attention. Here are some steps you can take if you’re dealing with a lock that doesn’t turn as smoothly as it should.

1. Check the Key First

Sometimes the problem isn’t the lock but the key itself. If your key is worn down, bent, or has sharp burrs, it can catch inside the cylinder. Try a spare key if you have one. If the spare works better, the problem may just be the old key.

2. Clean the Lock

Over time, dust, dirt, and grit can build up inside the lock. This makes the pins inside sticky and harder to move. Avoid using oil, since it can attract more dirt and gum things up worse. A better option is to use a lock-specific dry lubricant, like graphite powder or a silicone-based spray. Insert the straw or nozzle directly into the keyhole, spray lightly, and then insert and remove the key several times to spread the lubricant.

3. Check the Door Alignment

A common reason for sticking locks is that the door has shifted slightly. Wood swells in the summer and contracts in the winter, and sometimes hinges loosen over time. This can make the latch and strike plate misaligned, putting pressure on the lock. Try lifting or pushing the door while turning the key - if that helps, the issue may be alignment rather than the lock itself. Tightening hinge screws or adjusting the strike plate can often fix this.

4. Inspect the Lock Mechanism

If cleaning and alignment don’t help, the internal parts of the lock might be worn. Check if the cylinder itself feels loose or if the knob/lever has too much play. A worn-out spring or damaged pin can also cause sticking. At this point, it may require professional repair or replacement.

5. Prevention Tips

• Keep your keys clean. Wipe them before inserting, especially if they’ve been in your pocket or bag with lint and dust.

• Avoid using household oils like WD-40 inside locks. These might work temporarily but usually cause buildup later.

• If you notice early signs of sticking, deal with it before the problem gets worse.

In short: A sticking lock isn’t always a major issue. Often, it’s just dirt, a worn key, or a door alignment problem. With a little cleaning and adjustment, you can usually get things working smoothly again.