B.B.
It sounds like over time, you have removed the outer layer of the door knob. Why do you spray them all the time? Do you have a lot of people over all the time? Sick ones? Does someone have an auto-immune disorder? Of course you want to avoid spreading germs but be aware of how much chemicals are in your home and how they might effect your family. If the spray can remove the outer layer of a doorknob, think what it is doing to your family.