Whenever I try to unlock my car door, it's difficult to insert my car keys into the knob. Also, it's difficult to rotate them while locking or unlocking my car doors. Do you have any idea what’s wrong with my keys?
Firstly,  there is nothing to worry about. You need to spray oil in the lock. Sometimes due to lack of cleanliness, dust and dirt particles stuck into the lock. In this situation, it becomes difficult for a person to rotate the key in the lock easily. You should buy car lubricant from a hardware store to use. Don’t pour some random oil into your auto locks.