Debris or Dirt Inside the Lock Dust, small particles, or even metal shavings can build up inside the lock cylinder, preventing the key from engaging the locking mechanism properly.
Loosen the screws, realign the lock parts, and slightly tighten it up, checking that the lock still rolls smoothly through its action. Tighten the screws some more, check, repeat until the lockset is firm and moving smoothly. I also have a tube of ``lock ease'' or similar silicone graphite lock lubricant.
You certainly can use WD-40 in a lock, but you shouldn't. Almost all locks are designed and fabricated to operate without lubrication. If you add an oil or grease to them, that will serve to collect dust and dirt and increase wear on the lock, encouraging it to jam up.
Some of the most common culprits include: Dirt and Debris. Over time, dust, dirt, debris, and even broken pieces of your key can accumulate in the lock mechanism, hindering its smooth operation. This build-up can lead to a situation where the key turns, but the lock won't open.
Usually, this happens when the lock pins are dirty or need to be lubricated. Common causes of this include corrosion, rust, and a build-up of dirt and debris. Everything from outside elements like dust to the lint your key picked up at the bottom of your purse can transfer to the lock and result in sticking.
Oil, plus the environment – you don't want that in your lock, so you'll want to use a graphite or silicone spray rather than your regular WD-40 or other oil-based lubricants. WD-40 does make a product specifically for locks, WD-40 Specialist Dry Lubricant and we also like 3-IN-ONE's Lock Dry Lube.
Moisture inside the lock can freeze if temperatures drop low enough.
Seizing of Locks happens during cold weather due to the drop in temperature and cold air which causes the contraction of locks. If the locks contract this then results in the keys no longer being able to engage the way they should be able to resulting in you being unable to use the lock.
Common Causes of Sticky Door Locks
If a door lock is rusted or corroded, it can become hard to get the key into the lock, difficult to turn full, and also sticky and difficult to get out of the lock. If your lock is worn out, lubricant may be a temporary fix, but it's not going to resolve the problem.
Using a lubricant is one of the easiest solutions to release your stuck key from the lock. To fix this issue, take any petroleum-based lubricant and spray it at the spot where the key is inserted. We also recommend using a fast-drying lubricant to avoid creating a muddy buildup and attracting more dirt to the keyhole.
There are three main reasons why a door lock mechanism is stiff or sticking: Debris in the lock. Extremes of temperature. A broken lock mechanism or gearbox.
Lubrication: A common cause of jammed locks is lack of lubrication. Applying a silicone-based lubricant or graphite powder can help. Avoid oil-based products as these can attract dirt. Spray or insert the lubricant into the keyhole and gently work the key in and out a few times to distribute the lubricant.
One of the top issues with locks and keys occurs when dust and dirt begin collecting inside of a lock cylinder. When this happens, pins can get stuck, which prevents the plug from being able to turn correctly.
Use Graphite Powder
Graphite powder is an excellent lubricant and a great way to fix a lock that is becoming difficult to unlock. Powdered graphite lubricant can be bought in small bottles made of soft plastic with a nozzle, meaning it is easy to squirt a small amount of lubricant into the lock.
A door lock mechanism is complex, fiddly, and vulnerable to jamming. In wintry weather, locks can become stiff and difficult to operate, whilst moisture can create rust and cause the lock to stick and prevent your door from locking.
Don't use oil.
Oil might assist the moving parts of the motor in your car, but it is never a good idea to squirt it in a stiff lock. The oil will just combine with any grime already in the mechanism and compound the situation.
To unseize a lock your need plenty of WD-40 (or something similar, but don't use things such as 3 in 1 oils, PTFE, or Graphite). Key goes in but does not turn: Using the WD-40 with the straw attached to the nozzle spray a large dose into the lock and leave for a few minutes.
Yes, you can use Vaseline instead of WD-40 if you need a quick substitute. However, keep in mind Vaseline may not work for all applications, including inside locks. While it can work great on door hinges, it may be too sticky for locks and end up attracting dust and dirt particles—which can cause damage to your lock.
GT85 Lubricant is perfect for using and applying to Door Locks the GT 85 spray is a multi-purpose lubricant that helps keep your door and window hardware in good working order. GT85 lubricates and protects while also cleaning automobiles and motorcycles.
Graphite lock lubricants come in a squeeze bottle, aerosol spray, or loose powder. In my experience, the loose powder works best for sticking locks as it lets you control the amount dispensed into the keyhole.
Spraying your locks with WD-40 helps to prevent moisture build-up inside the mechanism, which would otherwise freeze over a cold night. If you're expecting freezing temperatures, spray some WD-40 into your lock and the lubricant will take care of things.
Although WD-40 lacks the ice-melting powers of an alcohol-based sanitiser or a de-icer, it will help to protect your lock and ensure that it's able to move as freely as possible.