Let down big time by Abus

[snailracer]

Maplins sells graphite lock lube in a spray can, £2.

3-in-1 is probably the worst possible choice, as the light fractions evaporate and leave behind heavy gunk, which builds up with each subsequent application and gums up the mechanism.

 

[subaqua]

only use WD40 if you need to clean a stripped down lock. then polish/dry all the bits thoroughly with a dry lint free cloth ( higear sportstowels work well) only lubricate a lock with graphite powder.

brass doesn't self lube , thats phospor bronze. brass locks will need a graphite lube once a year.

 

[szygy]

Stripping down a lock? Are you joking?
Who in their right mind would take a lock apart to clean it. I have taken locks apart (I have an interest in lock picking) and they require a special jig to compress the springs for assembly.
Don't use any kind of oil in a lock, and brass is self-lubricating which is why it is used in gas fittings.