DIY: How to Fix a Sticking Door Lock

A sticking lock is one of the most frustrating minor problems a homeowner can face—especially when you’re running late and your key just won’t turn. The good news? Most sticking door locks can be fixed with a few simple tools and a little know-how.

In this guide, we’ll walk you through common causes of sticking locks and how to fix them yourself—plus when it’s best to call in a professional.

🔎 Common Causes of a Sticking Door Lock

Before fixing the problem, you need to identify what’s causing it. The most common issues include:

1. Dirt or debris in the lock mechanism

2. Key is worn or bent

3. Misaligned door latch or strike plate

4. Weather-related swelling or contraction of the door

5. Lack of lubrication

6. Damaged or worn internal lock parts

🧰 Tools & Materials You May Need:

• Graphite or silicone-based lubricant (do not use WD-40 long-term)

• Screwdriver (flat-head and/or Phillips)

• Soft brush or cotton swabs

• Rubbing alcohol (for cleaning)

• Replacement key (if your key is worn)

• Flashlight (to inspect internal parts)

• Sandpaper or small file (for minor adjustments)

🛠️ Step-by-Step: How to Fix a Sticking Lock

✅ Step 1: Try a Different Key

Sometimes, the problem is the key, not the lock.

• Use a spare key if you have one.

• If it turns smoothly, your original key may be worn, bent, or damaged.
  Solution: Have a new key cut or contact us for key duplication services.

✅ Step 2: Clean the Lock Cylinder

Dirt and grime inside the lock can make it stick.
How to clean it:

1. Insert a cotton swab dipped in rubbing alcohol into the keyhole to remove debris.

2. Use compressed air to blow out dust and dirt.

3. Insert and remove your key a few times to loosen internal buildup.

✅ Step 3: Lubricate the Lock

Important: Never use WD-40 for long-term lubrication—it can gum up over time.
Use graphite powder or silicone-based lubricant:

1. Spray or puff lubricant into the keyhole.

2. Insert and turn the key several times to distribute the lubricant.

Need a professional tune-up? We offer full lock maintenance.

✅ Step 4: Check for Door Alignment Issues

If your lock sticks when the door is closed, but not when it’s open, you may have a misalignment problem.
How to check:

• Close the door slowly and see if the latch hits the strike plate cleanly.

• If it rubs or misses the hole, that’s your problem.

Fix:

• Tighten the door hinges with a screwdriver.

• If needed, file the strike plate opening slightly or reposition it.

• Add or remove shims behind the hinges to adjust door alignment.

✅ Step 5: Check the Lock Internals

If the lock still sticks, the internal mechanism may be damaged or worn.

• Remove the lock from the door (note: take pictures if needed to remember how to reassemble).

• Check for signs of rust, bent parts, or jammed springs.

• Clean, lubricate, and reassemble.

If this feels too complex, schedule a repair with our professional locksmiths.

🧠 When to Call a Locksmith

If the lock:

• Still sticks after cleaning and lubricating

• Shows signs of internal damage or wear

• Is part of a multi-point locking system

• Is on a smart lock or electronic entry system

… it’s time to call in the pros.

🔐 Integrum Locksmith & Doors offers fast, affordable lock repair and replacement across the GTA. We can diagnose the issue on-site and recommend the best solution—whether that’s repair, rekeying, or full replacement.

✅ Prevent Future Lock Problems

• Lubricate your locks every 6–12 months.

• Don’t use excessive force when turning keys.

• Replace old or bent keys promptly.

• Make sure doors are properly aligned to prevent stress on the lock.

Final Thoughts

A sticking door lock can be a hassle, but in most cases, it’s a fixable DIY project. Start with the basics—clean, lube, inspect—and if you’re still stuck (literally), our team is here to help.

📞 Need help fast? Contact Integrum Locksmith & Doors now or explore our emergency locksmith services.