Have you ever arrived on scene and find it difficult to open the Knox-Box? Overtime grit can build up in a lock core, particularly if the lock core isn’t used often. This built up grit can make it difficult to open the box. Knox utilizes high quality, precision locks that require a minimal amount of maintenance to insure continuous reliability. However, annual inspection and maintenance of the lock is recommended. Also, this is a convenient time to check the condition of the box and door gasket as well as verify that the key contained in the box is still current. A few minutes of your time now can help to ensure the Knox products in your jurisdiction work as designed when needed most.