Hello. Long time lurker layman here - only an intermittant poster.
I have a circa 1990 Abloy deadbolt on my (double) front door. Probably overkill, as a good kick would probably break one or both doors, but I appreciate the beauty of this lock.
Recently I'm having a problem - it's getting harder and harder to successfully lock the lock from the outside (i.e. the key side). It locks as always, but rotating the key backwards to the vertical postion - the only way to remove the key - starts retracting the deadbolt. I have to go back and forth five or ten times before the keyway rotates without initiating deadbolt movement.
Is this a simple matter of disassembly, ultrasonic cleaning, and very light lubrication or could the lock actually be wearing out?