You should first test the door latch to ensure the latch is sticking inside the door and not due to a misaligned strike plate.
How to fix a sticky door lock.
Use the right product resorting to spraying vegetable oil wd 40 sewing machine oil or similar products in the keyhole is a fairly common fix.
Below are 3 tips to fix sticky locks.
The fix in instances with a door latch stuck because it is jammed by rust and other materials it is always best to disassemble the lock and do a bit of cleaning.
Put on some gloves before you start spraying it because wd 40 can make a mess.
Ironically by cleaning and oiling them you can fix most locks in a matter of minutes.
To fix a sticky lock go purchase a can of wd 40 from your local hardware store.
How to fix a front door lock of a house that is sticking.
This will help to lo.
The problem however is that oil or grease will eventually make the sticking lock worse.
This video will show you how to use wd 40 penetrating oil to fix a stubborn or stuck door knob by spraying some wd 40 into the keyhole.
If the sticking area is along the door frame where the hinges are located this fix will not work.
Many people put up with the aggravation of a sticking door lock for years.
An effective front door lock keeps out burglars but when you find yourself struggling to enter your own home it may be time to adjust.
Determine where the sticking is happening.
Fixing a few stubborn locks might involve disassembling cleaning and then reassembling the lock.
Letting the components sit fully submerged in a vinegar of about 5 acidity will do the job of separating the gunk from your metal.
If it is happening along the top edge of the door frame this fix may only make the situation worse.
Turn the knob to open the door and release the knob slowly.