How to lubricate entry doors
How to lubricate entry doors and what to use : How To Lubricate Entry Doors
Quote from Article entitled How to lubricate entry doors and what to use:
Combination locks always have special holes for inserting a lubricant. Lubricants usually target the heart of the locking-mechanism while protecting it from dirt and corrosion. It is recommended to use such penetrating aerosols as WD-40, and so on and so forth.
The full version of the article can be found here.