There are dozens of reasons why your key may not turn the lock when you try to enter your business. Misaligned doors, building settling, swelling or shrinking of the doors from heat and cold, miscut keys, improperly pinned lock cylinders, sagging door hinges, and poor quality lock hardware are among the factors that might cause the key to turn hard" and the lock to drag". None of the above listed causes can be corrected by lubrication.
Yet, if you are like most people, and you encounter a situation where you have to force the key to turn, or shake, rattle and kick the door", to get the lock to release, the first thing you will do when you get the door open is find some kind of lubricant to oil" the lock.
I know of folks using cooking oil, Pam, Crisco, motor oil, graphite and in one instance Lock-Tite! Unfortunately the remedies often caused more problems then they solved. Especially since the majority of lock problems are due to causes other than lubrication.
