How to Maintain Your Door Locks and Prevent Failures

As part of property maintenance, door locks rarely make our checklists. Yet, they’re one of the most frequently used and most important features of your home or business.

We may live in one of the world’s most liveable cities: Melbourne, but it’s still a city (and its sprawling suburbs). Security matters. Ensuring your locks stay functional is a smart and often overlooked part of building maintenance.

Whether you’re a homeowner or managing a busy office, this guide will walk you through the signs your locks may be failing, how to care for them, and when to call in a professional locksmith.

A lock rarely breaks without warning. Typically, there are subtle signs of wear that indicate something’s not right. You might notice the key becoming harder to insert or turn, or it may require a little jiggling to get the mechanism to engage. In some cases, the lock might feel loose or misaligned within the door frame, especially if the door has warped with age or seasonal changes.

Other red flags include visible rust or discolouration, a key that gets stuck, or a lock that feels unreliable. Any of these can indicate internal wear, and it’s usually best to address the problem before you find yourself locked out.

For a deeper dive into whether your lock needs replacing or rekeying, have a look at our post:

👉 When to Change or Rekey Your Locks

We often get asked whether WD-40 is safe to use in locks, and it’s a fair question. While it’s a handy household product, WD-40 isn’t ideal for locks. It leaves behind a residue that attracts dirt and dust, which can cause more problems than it solves over time.

Instead, choose a graphite-based powder or a Teflon-based lock spray specifically designed for use in locks. These lubricants reduce friction without attracting debris, keeping your lock functioning smoothly. Apply a small amount directly into the keyway once a year, and operate the key a few times to distribute it evenly.

Avoid overdoing it. Too much lubricant can also interfere with the mechanism.

For more on proper care, visit our earlier article:
👉 4 Tips for Maintaining Your Locks

As a general rule, it’s worth inspecting and lubricating your locks once a year. For most homes, doing this before the colder months can help offset the effects of moisture and temperature changes on metal parts.

That said, frequency should increase in properties where locks are used frequently, such as rental homes, shops, or shared entry points in apartments. If we’ve just had a significant storm, you’ve moved into a new place, or notice a door that suddenly seems harder to open, it’s time for a check.

A yearly review might only take a few minutes, but it could prevent the inconvenience of a lockout, or worse, a compromised entry point.

Routine care can keep most locks in good working order, but there are times when professional help is the safest option.

a locksmith can diagnose the issue and suggest whether a simple repair, rekeying, or full replacement is needed.

You should also call a locksmith if you suspect the lock is no longer secure. For example, after a lost key, staff turnover, or attempted break-in. Commercial-grade locks and smart systems also require specialist tools and knowledge, which is where a licensed technician comes in.

We’ve outlined the key differences between replacing and rekeying in this article:

👉 When to Change or Rekey Locks

Locks are easy to take for granted until they stop working. Regular maintenance is the simplest way to keep them reliable and secure. With the proper lubricant, occasional checks, and a bit of awareness, you can extend the life of your locks and reduce the risk of unexpected failures.

If you’re unsure about the condition of your locks or think it’s time for an upgrade, the VicLocks team is here to help. We offer assessments, advice, and professional services across Kew and surrounding suburbs, for homes, apartments, and businesses alike.

📞 Need your locks inspected or serviced?
Book an appointment or get a quote today – https://viclocks.com.au/contacts/