Why does my deadbolt not line up?
One possible reason for this is that your door isn’t properly aligned. Poor alignment can occur because your house has settled or shifted over time, the door frame is old or warped, or the door is sagging on its hinges. Luckily, fixing the alignment of your door doesn’t have to be a chore.
Can you use WD40 on a deadbolt?
The simple answer is you should not use WD40 to lubricate locks. WD-40 is one of the solvent-based lubricants and does not contain any lubricant and over time can make your lock even stickier by gumming the lock up.